Gary, the serial number is 182033. Letter says it was shipped with black hard rubber stocks. Just need to know what they are called so I can search for some on Ebay.
I have ordered grips and such from them before. My understanding is the replica rubber grips are plastic, not hard rubber. So, if all one cares about is appearance vs. era correct, then gopher it!you can get good reproduction stocks for your gun from N.C. Ordnance
. . . They say that is an I frame grip . . .