not familiar with the pipe but if interested I have a neighbor with a CZ125 -ran last summer and a parts 250 bike in his barn. The 125 is pretty much all origonal and there the 250 is 3/4 there I think
Post a "Wanted" ad in the AHRMA newsletter and one will turn up. I see them there from time to time. I don't think anybody is still making replicas of this pipe, as they did nothing for performance and if I believe my CZ friends, actually slowed the bike down.