Yes, I have the same site bookmarked. This is where I found out about the converter in the first place.
http://www.theherd.com/articles/torque.html
When I bought mine, back in May of 99, I paid $206.50 before tax. This is the wholesale price. But one catch is the core charge. This is $35.00. The catch is it must be the same converter number. You might could take them any old 700R4 converter and get by with it. I didn't try. I just paid the core charge. So mine cost me $255.77 tax and all.
I just checked at gmpartsdirect.com and it would cost me $256 and change to buy one from them, by the time I added shipping. Here's the link to them.
http://www.gmpartsdirect.com/results...umber=24202310