Looking for a collet that will fit a 8mm motor shaft to accept a prop AND a spinner.

Tru-Turn seems to make them in smaller sizes:
http://www.truturn.com/cgi-bin/store...exact_match=on

I have a lightweight metal spinner that I want to mount on my electric plane. I can order a standard brass spinner adapter but would like to save the weight.

Essentially I'm looking for a collet prop adapter that's tapped in the threaded end to accept a spinner bolt.