Thanks jack on the advice, but this is not possible to make, at least for now. I do not have the technical ability to do it.
Gunsmith said that renovation of old stock, because of tear drops next sideplates (lockplates),.. will not be pretty, and it is better to make a new one.

I renewing the old gun and I would like to bring job to the end.
Hope it will be a nice new butt. frown

Mario