One of the 26"ers with integrated race and  Joe's 24" below

replica bars. Thick, Spooky and BMWs... though these are all 25.4"s. Don't know if all of those were 25.4 clamps.

These are for sale for $270... a joke, but that is how much they owe me in time spent anyway. They were supposed to be 400mm ATC and they're 395mm. They can fit a 3/8" axle/1.3" diameter peg or a 14mm/1.5" diameter peg. The 14mm (axle thru hole) peg fits pretty flush with the cutout so its probably the better choice.

This is the reason a few BMX companies have turned to cast dropouts with this peg cutout: they only require plugging the dropout into the leg and brazing into place.