I'm not sure if the part you are looking for is reproduced, see attached pic for what I used for my 72 BBB. I just had to trim a little off each end. A pretty good fit I'd say.
I thought that was the hose that @copperheadgs1 was supplying but can't say for sure. I've been meaning to get a few from Dave if so.
I just text Dave. Our last few conversations about stamps/hoses haven't given me the impression he's interested in doing them at all anymore. I'm gonna see if he'll sell me all the stamps and then I'll update this thread & start a new one in regard to how I'd go about running the operation.