To help answer the grip question. Ruger offered the guns with the rubber grips and either the wood or the ribbed plastic insert.
The grips that are all rubber are normally aftermarket.
The SP-101's in .22 LR are a bit harder to find occasionally. I went to a gun show yesterday,, (as noted,, you can't find something if you don't look,) to mostly browse & try & pick up a few small odd items. I found a few OM Rugers,, but they were either too rough for the asking price,, or just plain overpriced.
Yet,, I did see a few NM's that were desirable to many that were fairly priced. If I'd been looking,, (Sheriff's model, stainless Vaquero with the correct poly/ivory emblem-ed grips, for $700) I would have brought it home. Then there was the color cased Vaquero in 44-40, that showed the color wearing but was priced at $650.00. I saw a Low Back blued Security-Six that needed some TLC,, but still it was a low-back, and for it's condition, fair.
Of the SP's I saw,, none were in .22.