Seemingly with no fanfare whatsoever, Motor Sport have put their entire archive of back issues online. Free!
The main part of the database is the same as the DVDs which were released some years ago, but it has been updated to include - at the time of writing - every issue up to January 2014. This of course has both up- and down-sides: the OCR standard of some of the original scans wasn't great, but they have added an error reporting tool and also enhanced the database to point you to 'related' articles. Presumably they would be happy to receive corrected versions of OCR-ed articles in order to improve the search: Google site search may perhaps return better results since you can use wildcards with it.
Unless I've missed something, it's not possible to (easily) download the full-size original pages, but there seems to be nothing to stop you simply copy/pasting the OCR versions as a text document.