I believe that Michell makes (or made) a clamp for the short spindle.
It looks like the normal Michell clamp, except it is marked with an R on the top and is made specificly for the Rega. I've seen a couple Pictured and described as such on ebay.
It looks like the normal Michell clamp, except it is marked with an R on the top and is made specificly for the Rega. I've seen a couple Pictured and described as such on ebay.