Just get a nickle plated SRAM PC870 or 890 (or PC68 if you can find one) and you'll be set.

Yeah, the Regina Oro chains were cool back in the day; no way I'd pay those kinda prices for one though.

BTW, last summer I ran across a PC68 at Nashbar of all places for $15 on clearance so I picked one up and have been using it on the RRA. Seems fine so far (at about 1K miles).