Do you want stick on or cut our flares?
Warn makes good flares, as do several other manufacturers.
Cut out flares are good if you want a little larger or wider tires and don't want to lift your truck. They remove about 1 or 2 inches of fender.
Stick on kinds do just that. Kinda cheezy and fall off after a few years. Good ones don't, but they also cost more $$.
Then you have ones that attatch with screws. These can be good too, but like the cutouts, you are not going to want to take them off...kinda like a tattoo, youre committed for life (or new fenders!)
It just boils down to why do you want them and how much do you want to spend. 1st gen have a lot of good choices available from just about anyone who does aftermarket peices. Try
http://www.performanceproducts.com/ for some nice ones...or any of the advertised sponsors on this site, tho they seem to cater mostly to newer rides.