Like mentioned above there isn't a whole lot of aftermarket for gen 1 trucks.
, If you're mainly after looks you can try finding some different wheels to give it a meaner stance, fab up a bumper, same for a tire gate, fenders, etc.
For suspension, if you wanted a long travel kit like prerunners you'd have to fabricate it yourself or get a shop too. If you'd just like some lift though search around the web for something you like. When I googled your year for lifts there were a few options. You can always ask a company too if they can help you out with some custom parts.
Icon like mentioned above has great stuff from what I've read and been told, good enough for me to get their projects. They also have awesome customer service who don't mind answering your questions. Same for carli, they've made some nice trucks that fake some abuse!
Good luck!