Stainless trim bezel

I am receiving a warranty replacement for my 645M, I had a stainless bezel trim ring installed on my former 645 and would like to do the same to the new watch.  It appears these rings are no longer available for the 645, does anyone know if one for another model will fit the 645 ?  The vivioactive 3 looks very close, maybe the 745...any help would be greatly appreciated.  thanks