I
might have found one for sale, though I'm not sure, and the website doesn't list the price - you have to use a form to request a quote.
Anyway, at
http://www.bbsolutions.com/sgi/crimson.html (sorry, there's no https version.)
we find:
013-0675-001 | PCA SET GU1 RU1.1 VB2 MG1 AB1 |
So far, the "AB1" is the only thing that matches. But let's now look at an old post from comp.sys.sgi.hardware:
groups.google.com
Gary Stratton
Oct 7, 1994, 12:41:17 AM
* Crimson systems (configured in deskside chassis) can be configured with an Extreme graphics subsystem, which is the same Extreme used in Indigo2 (desktop chassis) systems.
* Extreme graphics consist of boards: GU1, RU1, VB2.
* To adapt the above boards for a Crimson, one needs an MG1 adapter and an AB1 adapter. Some how the Extreme boards plug into the AB1 adapter and the AB1 adapter plugs into the MG1 adapter, which plugs into the Crimson chassis.
So it LOOKS like they're offering a set of Extreme boards for sale, bundled with the AB1 adapter you were looking for and a second adapter (MG1) you might need.
Sounds like it's worth contacting B&B Solutions. Let me know if it's what you were looking for, if the price is reasonable - and if not, whether you think you can get them to sell the adapters separately at a lower price.
Now, I notice you've posted the WTB on Irixnet too, so I'd better nip over to there and cross-post this!