OK, you asked for it.  These are perfect BLACK Reproduction Food Grade Silicone mouthpieces.  You can get either the VOIT or the USN.  Buy 5 and get shipping free!.  US Divers and Blank are available at www.vintagedoublehose.com/store/index.php?main_page=product_info&products_id=392 . 

New GREEN curved VOIT or USN silicone are now here as well in limited quantities. 

Price $25.00  

Shipping for the first 4 is only $5.00