I have been working on getting my time down on building my Seawolf impellers so I can sell them with my kits or separately. They were way to time consuming to sell at first but I have refined the process and made fixtures so I can now sell them to those who would like them. They are made of copper and come silver soldered to a 6" x 1/8" brass shaft. I also supply a Rulon bearing which can be permanently mounted in the sub, and requires no maintenance. The price is $35 plus shipping. If you would like more info email me at. [email]firstname.lastname@example.org.[/email] Thanks, Dave.