bummer
I agree with the statements above (even the ouch) - one other place to check on making a replacement would be with Larry at
http://dutchmanwoodworks.com/ - he is good at fabrication and as reasonable as they come, always a long shot possibility that he can modify one laying around cheaper than making one (still not cheap)
I always wonder how so many forends get separated from their guns- since I "always"
reattach mine to the barrels when casing the gun
then this past November- we were getting groceries out of the back of the truck and my wife handed me something and said "whats this" - ummm- the foreend to the DH 12 I was hunting with the week before
sorry for your friend's bad luck.