You can call Gravel Agency and give them your serial number .... they can look up what part number corresponds to your forend, and they can order it.
I did just that .... ordered my forend from them ... and it arrived 3 month later.
Now was it an exact match? No .... but it was close ... wood grain pattern and color tint were slightly off ....
So, the chances for getting or finding an exact match are not too good.
If you want an exact match .... you either have to refinish the forend and the stock ... and to give them the same look .... or buy a matching stock and forend.