You don't. They went out of business in 2000. Try e-gunparts.com for parts. Also try Bob's Gun Parts; he has lots of grips.
Unlikely
Yes
They're scary looking.
most any large gun store will have them.
Best left to a trained gunmsith
Grips, magazines, sights.
Do an internet search for Colt SAA grips and be prepared for dozens if not hundreds of hits.
frame, barrel, sights, grips
Check the markings on the slide, frame and grips.
The 132 came with plastic or wood grips. Some of the plastic grips had Checkering, however I do not believe the wood grips ever had checkering.
They have been made.
Try the link below.