I wish I'd known those sizes before ordering some from Ahrends a few years back. Couldn't just one at that time, as they were sold in pairs. And they were about $12 for two. Still got that one screw, if I remember correctly. But I lost the K-frame boot cut Modello grips somewhere in my house.
They were well fitted to the gun and looked fantastic. I think they eloped with some N frame SQ butt grips.
If I happen to run across an offspring of their's, I'll be tickled pink to have a screw for it! LOL!