I'm pretty sure those Sanwa sticks will not fit a Super base.
Happ sells replacement blue handles for the Supers though, as well as red (maybe others?) You can get them from Happ or from one of the Happ resellers here on the B/S/T board like PonyBoy or Divemaster. If you are looking for replacement blue handles that don't look like the originals, Slikstik is one of your only choices. Randy at GroovGameGear may have sticks that fit supers, I'm not sure.