Hi Iron,
You did good! Good price, good gun.

The model 10 is basic and dependable. It was the primary duty sidearm for most police departments for many years until the high capacity auto craze hit in the 80's. According to the serial number, you gun dates from 1975-76.
Your 10-5 is a "K" frame S & W and any K or L frame stock/grip of any year will fit it. You can buy new ones from the S & W site,
http://www.smith-wesson.com/webapp/wcs/ ... &training=, or from many after market suppliers or auction sites. You didn't say whether your gun was a square butt or round butt model but you can check the pictures in the "service grips" section and see which one fits your gun; square or round. Shop around for a while before deciding because the choices of styles is endless and the prices range from reasonable to ridiculous.
If your daughter is going to be the primary user, I would suggest that you take her to a gun shop and let her try different grips to see which style she prefers and can handle easily.
I still have my model 10 that I bought new in 1965 ($48

). I also bought a stainless version of the same gun in 1981, a model 64.
Good hunting!