Totally agree with the above opinions. Nice looking revolver, congratulations!
You can find the correct size - Ns - on the large auction site, but you don't need to just jump on the first pair you see. They come up regularly so you have time to choose a set that matches both sides in color well, or has a grain pattern you like if those things mean anything to you.
Once you get them in, if you do not have a J or L-framed revolver, you can put those up for sale.
Also, if you are planning on using speedloaders, there is also a type where the left side stock panel will be "U" shaped at the top to allow more clearance for speedloaders to be used.
The ones you have are known as "football" stocks due to the shape at the top of the top left stock.
If you are not going to be using speedloaders, those types are perfectly fine; you can use speedloaders on football stocks as well, but the other type are a little easier to use with them.