I’ve only replaced a couple of them but from my experience, you only replace the glass or the whole housing if that is the part causing the problem. The last one I got from Rockauto which was an after-market but an exact copy of the original OEM. I paid about $50 for it. No painting was required on mine but for $20 you can order the spray paint in the original color and do it yourself. So either get one from a junk yard, pay the freight from a dealer, or do it yourself. But messing around with glue and so on is just not going to be satisfactory.