Any question answered...

a website that...goes back to the early 90's

There's your trouble. Well, that and the grocers' apostrophe. The kind of detailed breakdown of pro gear your looking for only makes sense as a contemporaneous web article, so it only started when the web had enough audience to make it viable. Even now, the coverage is not comprehensive by reference to just the main news sites, so there's a bit of detective work to do among the sponsor sites and team publicity to nail down the more obscure services courses.

There are histories of some of the frame and equipment brands, but nobody was collating a list of which combinations were used by particular teams, and many of the histories are occult anyway, either because the brands have no interest in their own history and not enough cachet for a geek to compile them, or because they were never published in an accessible way and the companies are now defunct.

There is enough good quality photography from at least that early for an obsessive cataloguer to pore over to create such a resource, but it might fall to you to be that person.

ETA: 2002 looks like the practical starting point of the kind of thing you're after which is still accessible. Not comprehensive, but a start. You might have to tweak the details of the URL to get successive years, but the Autobus engine seems pretty flexible.
http://autobus.cyclingnews.com/tech/2002/features/probikes/