I have the same grips on my 642 as saemetric has on his 36. Slightly longer in the hand than the stock boot grips. That extra quarter inch makes a difference in that my little finger can get a purchase and it improves the handling. Still thin enough for pocket carry.
Altamont had those Pro Series grips listed on their website for a while and has taken them off the listing. I wonder if they couldn't keep up with demand?
Wow! I've never seen these before. I may have just found what I want for my model 49! I particularly like the Andean Alder. Esmeralda's site is in my favorites now. Thanks for posting!