I found my complete Lvl II setup by using Car-Part.com--Used Auto Parts Market
. If you find a donor truck make sure you get everything from it. Here is a list
t-case and tranny shifters
shift bezel and boots
floor plate (bolts to the floor under the carpet)
Last but not least the Speed sensor for a Lvl II. I didn't get one with mine and good luck finding a new one.
Thats if you want to do it with all the "correct" parts. I know I've found at least 2 yards one in New York and the other up in Michigan or somewhere around there that have Lvl II twin stick trucks. What I did was I bought the T-case and got the yard to throw in all those other parts for free. :)