if you want cheap straplocks that help prevent the straps from falling off from normal usage(no malmsteen guitar swinging), davis sells it at $2 a piece, so total would be $4 for a normal guitar
if not you can try sweelee, they sell planet waves plain coloured poleyester straps at $12 a piece, those hold quite well, BUT they do sort of scratch the paint/ laquer of the guitar near the strap pin, and u have to check and lock them everytime before you pickup your guitar, or you might see a dent on it