I have just such a rig. It has an Ethernet card installed, the video capture card, memory boosted to 80Mb, an L2 cache card, and even a new internal clock battery.
Because of a nice package that I just picked up on eBay, I probably don't need this anymore. I rescued it from a recycling center so I don't have much cash tied up in it maybe $40.
Does anyone have any interest in it? One challenge, of course, is that it is heavy so shipping to someone would almost effectively double the cost.... maybe someone has something they would want to trade?
Anyway....if you have any ideas, questions, offers, let me know. If you live close enough to Gainesville FL, we could even offer to meet somewhere 1/2 way between us-- I like a good road trip!