Few gun stores seem to carry the inventory they once did.
Pachmayr changed their design to a type that is one-piece, open down the front. You have to shove it on the frame. I prefer the older two-piece sort, and they feel better, too.
I've had to buy at shows, where prices range from maybe $3.00 to $15.00, depending on who has them and if they're new in box. Occasionally, I get lucky and buy a used gun with a nice set of Pachs on it.
I normally prefer the Presentation or the P. Compac (for J-frames) but put Grippers on my GP-100, because they're all that I found that fit the frame right and also fit me. I tried three sets of Uncle Mike's and none fit the gun right. I do like Uncle Mike's on S&W's, but they quit making them. I can't get used to Hogue's; they don't feel quite right in my hand. May try their small ones on an SP-101. Some say they cut recoil effect, a real plus on a small .357.
I gave up on fancy grips as so few really fit the frame right without custom inletting, which I can't do or afford. And I don't want to send my guns to a stockmaker.
Other than Pachmayr, my grip preference is for older S&W smooth rosewood grips, with dark wood having even darker streaks. If they're service/Magna stocks, they get a Tyler adaptor. I have a set of Magnas for a square butt J-frame that feel wonderful with the Tyler. (NO, NO, NO, they are NOT for sale.)
I find very few grips that really fit my hand as well as the Pachmayr Presentation, with Uncle Mike's being a close second. It is worth noting that custom gripmaker Craig Spegle (sp?) designed the Uncle Mike's.
I don't think of my Pachmayrs in Goodyear terms. I see them more as Pirelli's top line. And they don't scuff or dent as wooden grips will. And they stay put in my sweaty hands as I check out sounds where nothing or nobody is supposed to be. I did a lot of that back when I wore a badge. Still have to, thankfully a lot less often.
I bought my M-66-3 new in box in 1990, with a very nice set of target Goncala alves grips on it. They reside in the box. I immediately put P. Presentations on it and they are still there. (I do want to keep the factory stocks; please don't ask to buy them.)