Sliding glass door roller needed

Hey guys and gals,
Most of the rollers at the local stores are a bit bigger than this. The only marking I have on my door that I can find says ppg herculite k which I know is for the glass.

Also the one in the picture is broken there were pins holding the roller in that slot but it appears they have broken off and obviously theres an adjustment screw thats supposed to be there as well.

Hopefully you guys can help me out. Your video on replacing these was stellar. I'm pretty sure its going to save me a ton of money as long as I can find the right ones.

Thanks in advance,
Charlie