I'm guessing they are both from World Plastics. VW probably using multiple retail outlets.
Be very surprised 2 somebodies saw enough demand for these to make 2 different mold sets. Plenty used on eBay under $20.
Somebody know something I'm missing? JT's includes hardware - particularly the wire guides which are very close if not identical replicas.
I also believe the carb screws, drain and sync, that JT sells were spec'd and sub'd to a screw machine shop by Vic.