FFG (Freeware Flight Group) also made 737-800's with winglets. They made Air Europa, Virgin Blue, ATA, Privatair, and a couple of BBJ Jets. They also made a Copa 737-700 with winglets.
Just go to avsim.com and put ffg in the search field and that will show all the ffg models avsim has.
Don't give up don't ever give up - Jim Valvano