The adapter is not included but Radio Shack should have one. I was trying to find out the differences betwixt the cards recently but to no avail. But, as the others are never in stock and the $96 one is confirmed made by ATI with 4ns RAM then forget about them.
The other option is to get a retail one for around $120 as it will have the adapter and a longer warranty and may be faster (3.6ns RAM?).