I stopped and asked about one. They have a few but he was talking $1000-$1200 for everything you'd need to do the conversion. He also said 90- (I think) 97 will work. The earlier years being plug and play on the wiring harness. Later years you'll have to splice your body plug to the hood harness....
none of that is an issue because I gave him the truck's electrical manual, hardcopy and PDF.