I just looked at the ser # it is 61 engraved on trigger guard so may be a very early Linder gun with out stampings I was wondering why so little stampings and no proof marks now I am thinking this is a very early Linder there is an other stamp on the barrels but is so small looks like typewriter keys even with a 10 power loup I can not make it out the quality is poor compaired to the other stamps on the gun. I will steel wool it tomorrow and see if I can make it out it is so small hard to see it is stamped.
It was made before the proof laws came into effect. Thats why it lacks marks. One of the things that makes early Daly's interesting. I'm afraid there's usually not an inexpensive solution for a lost forend.
You can always get a piece of Walnut and try to mock one up so it could be displayed above your mantle.
Regards
Ken