Joined: Feb 2012
Posts: 19,320
Likes: 5,429
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
AT one time these backing plates/adapters were as common as most of the DT levered bikes from the early/mid 1980s to the mid 1990s used them. Curved for steel frames and some AL ones and flat for those AL frames with bonded/bolted through lever bosses.
The levers should, IIRC, work Ok with the flat plates. But any shop that has been around for a while and believes in keeping old stuff around for future repairs very likely has some curved ones in a box. Andy.