[MrBorland]

Herrett, Nille Griffe, Randall Fung and Trausch come to mind.

http://www.herrett-stocks.com/tgtrvllg.htm

http://www.nill-grips.com/Revolver-Grips_105.html

http://www.jnb.com/~funggrip/revolver.html

http://www.trausch.com/form/accueilA.htm