Similar to the BSS line of thinking...the local shop has had a Charles Daly (Beretta mfg.) on the rack for quite a while.
This gun has BTFE, ST, Semi-pistol grip, tight chokes and 30" tubes (2" short of your requirement).
I'd guess it's in the 7 1/2# range (maybe a bit light?). If I were a duck or goose hunter, I'd have snapped it up by now.
This gun is in nice shape and could be had for 800. It would also make a good turkey gun or a "posting" gun for phez.
I think there are lots of good directions you could go with this. A fun project--good luck.
-jim