Ok, maybe I'm missing something, but I don't think so.
The Venus, Jr Statesman and Jr Gent all use the same tubes. Rather than having to make a MOQ of 500 pieces and waiting 10 weeks ( yes, Chinese New Year REALLY slows down shipping from Taiwan this time of year) WHY NOT get a few Jr Gent or Jr Statesman NON postable sets in the same plating? The only part you need is the non-postable finial.
Simply replace the finial from the Gent or Statie with the postable Venus. Some time ago the non postable Jr Statesman had an embellishment on the finial. This embellishment was the same size as the crystal in the Venus. With a punch, the embellishment could be popped out and the crystal glued in. I HAVEN'T MADE a non-postable Jr Statesman in sometime, and I seem to remember that the embellishment was no longer there, but instead simply smooth. If this is still the case, you could use the much less expensive Jr Gent finial end.