Hi ADW, welcome to the forum!
I always enjoyed the James Hardie 12 Hour, and each race was better than the one previous. In the 1992 edition, the brand-new Mazda RX-7's qualified on the front row by a substantial margin ahead of the Toyota Supra Turbo that had won the race the previous year and a Holden Commodore VN Group A driven by Wayne Park. I don't have any data on the Saab's qualifying position, but I'll check the tape next time I'm home (probably next weekend).
The Mazdas led away and dominated the early going whilst the Saab was an early visitor to the pits, coming in at the end of the first lap. Glenn Seton had started the race at the wheel of the car and reported that he could hear a sort of 'ticking' sound coming from the car all throughout that first lap. It was found that a brake line had been rubbing (IIRC), so the problem was quickly rectified and the car sent back out but at the tail of the field, a long way behind.
Later in the morning, the Mazdas both struck problems, the O'Brien/Waldon/Gibbs car dropping out of the top 20 before rejoining whilst the lead car of Bowe/Hansford had a brake caliper jam on before a turbo came off, relegating them to 52nd position. At this point, the Mazdas, the BMW 5-series of Longhurst/Jones/Crichton, the Smith/Bourke Supra and the Wayne Park Holden had taken turns in the lead, whilst the Saab was slowly making its way back up the field.
As the race wore on, the little Ford Laser TX3 4WD Turbo of the Youlden brothers and Dick Johnson started to come into contention. The Laser - second-placed in the 1991 event - was a chance at winning now that the Mazdas had run into trouble; the car would make fewer and quicker pitstops than any of its rivals and would lap at a decent pace. Sadly, it would break a CV joint at the start of the last hour whilst it was running in second place.
The Park Holden lost a wheel whilst leading, before one of Park's co-drivers bunkered the car in a sandtrap, putting the car out of contention. The BMW suffered an exhaust problem that made the car sound horrible but made little difference to its lap times. The Smith/Bourke Toyota then led the race before the #17 Mazda charged back through the field and swooped into a lead that it would maintain until the end of the race. The Supra later went out when it too lost a wheel.
After its first lap drama, the Saab was running reliably, consistantly and had made its way back up into the top five. I can't remember how the tail end of the race panned out (I'll have to go back and watch the tape), but I don't recall Bondy trying to catch the BMW to take 2nd, instead just taking a comfortable 3rd.
The real battle at the end of the race was in the smallest class in the field. The Brame/Draper/Lee Suzuki Swift and the Watkinson/Willmington/Lewis Toyota Corolla had been shadowing each other all day and on the last lap, it looked like the Corolla would just come out on top, before it ran out of fuel on Conrod straight, allowing the Swift to take it class victory.
Incidentally, IIRC, the Saab deal was put together by Sydney car dealer Ken Mathews, who asked old team-mate Bond to drive, and I think it was Bondy who recommended that Seton be asked to co-drive.
I hope this helps you a bit, it's about as good as I'll be able to do without having the video beside me.
Out of curiousity, do you happen to have full results? I only have what was published in that year's AMRY, and that only covered the top 20. Would you happen to have full race and qualifying results and the winning car's race time?
Cheers, Mick
Funny how a 12 hour race can go for 48 hours. 
