10mm to 6mm balltop adapter

[Dekieon]

Hello eveyone I am having an issue with my joystick selections, and could use some advise.
I am planning on getting some Hoku 38mm Ball tops. Additionally I am planning on getting some Long JLF Stainless Steel Hollow Joystick Shafts to replace the solid JLF shafts that will come with my SANWA JLF-TP-8YT Joysticks that I plan on purchasing.

The issue is that this ball top has a 10mm thread and the shaft has a 6 mm thread. The description of the ball states that I can use a 10mm to 6mm insert, but they don't seem to sell the adapter, at least I couldn't find them on the site. Another option would be to find a ball top like that that has a 6mm thread, but I have been unable to find one.

Does anyone know where I could purchase a few of these adapters? I tried searching Google and have come up empty.

[BadMouth]

http://www.focusattack.com/sanwa-lb-30-n-s-battop-adapter/

[Dekieon]

Thank you for the link, I've been looking everywhere.