Here is a picture of the correct grips for your gun.
To be VERY specific, your grips should have "silver" washers on the back side. Dark washers were early style from just after they stopped with the diamonds.
Perfect new take offs like this are bringing as much as $150.00 these days. Less perfect examples from someone in a hurry to sell them might let them go for $100.00
The ones pictured are NOT for sale