I picked up a still functioning Crimson Trace LG 525 for next to nothing.  It's the discontinued model with the battery and switches in an AR grip and the laser mounting to the carry handle.  The problem is it didn't come with the grip screws or "Retaining Bracket".  CT can't help me.  Not much comes up with a Google search.   Any one know of anybody who would deal in discontinued CT parts like this?

Contact ct, that's what I did. Some of the best customer service you will find!

Yep, tried them.  Didn't have any parts around because it's been out of production too long.  They said the cannibalized a display model for the last guy that called.

Longshot, but maybe look at some other foregrip assemblies and see if you can find something that will fit. M1913 rails are a standard across the industry. It would seem likely that the mounting hardware should be at least similar enough between yours and some other foregrip to make it work.