There is always the euro gear from NECG.

http://www.newenglandcustomgun.com/

This is all Recknagel gear but the recknagel site only brings up the uncle mikes style. Claus Pommer who advertises (or used to) in the NZ G&H is the NZ agent for Recknagel.

NEW ZEALAND - AUSTRALIA

Klaus Pommer
P.O. 100 126 / Northshore Mail Centre
NZ-0000 Auckland

Phone: +64/9/4150775
Fax: +64/9/4150775

E-Mail: kpagencies@xtra.co.nz
www.airgun.co.nz

There is a catalogue at the dealer site and scroll down to permanent swivels.
International dealers.
http://www.recknagel.de/Joomla/en/contact-us/dealers.html

Von Gruff.