slight necro - but I just thought I'd point out you can download at least one of the games you originally asked about, from abandonia, your one-stop legal downloading abandonware shop.
(also a slightly shameless plug, since I'm part of the news staff over there)
http://abandonia.com/en/games/208/Betra ... ondor.html
You can't download Eye of the Beholder mostly because the ESA are fags, along with their affiliates, but hey, whatever.
As a small consolation prize, if you google (or go to) vimm.net and look up EotB under SNES, you can get the first in the series, although you'll have to download an emulator from the same site, but it works pretty well and I've used it often for a lot of old SNES games I've found there.
Feel free to let me know if you have any questions - I'll be lurking now and again.