Locking Screw for GSLN1,2 and 3

i still love having a tremolo on my guitar but it becomes such a pain when the parts are always failing i know how to fix most things that get wrong so the problem isn't having to pay to get them fixed or set its just i always have to find new parts and order them and wait which blows so bad does ANYONE KNOW A PLACE/WEBSITE OR SOMETHING THAT I CAN GET THEASE SCREWS AT BY THEM SELVES i already tried gpdusa.com which is awesome but they are sold out and i don't want to buy the whole locking nut just for the screws : (