Hey thanks for the info. I'd been leaning in the direction of contacting recyclers in the southern US states -- I've had some success doing that when dealing with similar parts problems in the past. Don't know if it's at all helpful here, but based on GM part numbers it looks like the following vehicles use the same rear bumper reinforcement as the 1997 Cutlass Supreme:
GM Part No: 10274675
1990-94 Buick Regal (coupe)
1990-97 Oldsmobile Cutlass Supreme
1990-96 Pontiac Grand Prix
If I'm mistaken on any of the above info, please let me know. Thanks again for the help!
--Greg