No problem
Definitely do keep your Janty DOA and keep attempting to contact. While they may be a bit backed up and behind on responding, I do think they will make good. What methods of contact have you tried? You may wish to post in the Janty Suppliers section forum. Or perhaps PM JantyUSA or Ludo if you havent by chance.
As far as a rather immediate replacement, I might suggest
Vapor Guys.com. They just received their shipment of 306a parts yesterday (according to their almost daily updates), so they should be well and stocked.