I have H&R 20 Ultra w/3x9 on it. Sweet Gun! Not for sale though.
I bought mine used from "Hopkins Gun Shop" in Milton about 5 yrs ago.He carries alot of good used and new stuff. Located on Joseph Rd off RT9. 302-684-4878. Also - just up the road a mile or so on Rt 9 is "Steeles Gun Shop",don't have his ph# on hand. There is also a big gun shop in Laurel (I think it's "Tods"?). They were just robbed couple weeks ago(stole 14 weapons).
Anyway - you might have some luck in lower DE finding that gun used or new. You'll never go back to a 12g once you've used the H&R 20 for couple seasons. Good Luck.