haven't bought from them yet so no feedback from me as to the quality of their products but you may want to check them out for yourself...
http://www.reelpowerhandles.com/
tight lines!
Dawn at Smoothdrags has many of the same handles And many blank upgrades (arms) for them also......
http://www.smoothdrag.com/handles.html
Plus so much more for Reels & repair/upgrades...
Her Being a member here at Alans site makes contact and info very easy & fast also... :-)
.
I have ordered from both Dawn and Stephen(reelpowerhandles)....
They have gone over pretty well. I have put the T-bars on TLD's, round knobs on Toriums and Penn 750's and the soft T-bar handles on some 6/0...
I drill the hole out to 15/64, not 1/4 or 6mm as they suggest. This makes for a very snug fit and no wobble in the handle.
It is important to use some blue loctite on the screw going into the knob.