[jan-jaap]

You could post in the Wanted Hardware forum: https://forums.irixnet.org/forum-25.html

I'm dusting off my 4D25TG with a mind to sell it soon.

Be aware though that they may fetch an off-putting price. If the software experience is more what you're after, something like an Indy might be more reasonable.

I think the TDI software is from the IRIX 3.x era, in which case it won't work on an Indy.