Motorola PMNN4087A Li-Ion Batteries

I bought some old R765s and I want some new batteries. The current batteries show Motorola PMNN4087A Li-Ion Battery 1010mAh. I have poked around a little bit, but I haven’t found anything other than the standard battery for this. Is there, or was there, ever a battery made with more capacity than 1010mAh?

The lowest price I have found so far is $78.71 from Radio Parts. Are they a reputable dealer? Also, I recall going to hamfests years ago and some places would rebuild battery packs. I never have done that. Is it a good option? IS it better quality or more reasonably priced?