Can anyone identify these exhaust pipes?

[73Ghia]

Does anybody have any idea what name/brand of exhaust this is? Or possibly where to purchase? I've tried searching and haven't had any luck, but not sure what to look for. This is one of the few aftermarket pipes that I think look really good on the Dream. I'd like to know what these are for future reference in case I don't want to drop a grand on repro pipes.

[conbs]

They look like the "Super Sport Muffler" in the 1964 WEBCO Catalog.