Six Flags Over Texas in Arlington, TX has one of their gift stores (the kids store in Mexico area) with a TF section. They got G1 stuff like; Transformers Monopoly, transforming key chains, and light up key chains, as well as movie stuff like ;Optimus Prime and autobot symbol kids shirts, and a large variety of movie brand hats.
If you happen to be lucky enough to live near Six Flags over Texas, be sure to stop by and check out what's available.