You didn't mention price or material so I chose expensive aluminum.

You didn't mention a diameter so I randomly chose 2.5 inches.

http://www2.towerhobbies.com/cgi-bin...?&I=LXFBJ9&P=7

Most likely any Tru-Turn listed that says it is for "wide blades" will work without modification.

Nylon spinners can be trimmed to fit with a hobby knife.

If you decide to use Tru-Turn, you can email them questions using one of the addresses on this page. Since you're in Portugal it would probably be inconvenient to call them but there is a number on the site if you need a fast answer.
http://www.truturn.com/contact_us.htm