Hmm, how did you keep a '91 running so long without ebay?
Use the following search on ebay:
trofeo (visual information center, vic)
I see 2 listed, ~$425 & $700.
I suggest that you jump on the cheaper unit. If you're willing to risk someone buying it in the next few days, you could make an offer for ~5% less -- or ~$400. Most sellers that have a "make an offer" option, accept offers of ~5% less.
Or, try and find a similar vehicle on car-part. BUT, there's a HUGE RISK buying something like that (electronic - subject to failure) from a salvage yard that hasn't tested it, and doesn't offer a refund. Plus, you'd be out s&H both ways even if they do offer a refund.
For a part like a touch screen info center, you should try to find a place that you can drive to and offers refunds.