How about this as an option (no time now to see if the .ca site has them):
StarTech BRACKETFDBK Front Bay Bracket Adapter - 3.5 HD to 5.25 at TigerDirect.com
Canada Computers can also order one for you:
Canada Computers | Cases | StarTech 3.5in Hard Drive to 5.25in Front Bay Bracket Adapter (BRACKETFDBK)
Also, post in the B/S forum someone may have one lying around. I had a few come with my cases over the years, but pretty sure I have tossed em out or gave away with the cases they came with.