Right before i get shot down in flames this is only five minutes into investigation and i might be talking out my arris! Just having a tidy up in the breakers yard,sorry garage. I came across several old Fiat coupe 16v non turbo rear calipers. Ive owned six coupes and still have two so there are loads of parts in my garage. I am trying to sort my rear gtir calipers out at the moment and the piston and seal is corroded and split. Rememebering that the rear piston on the fiat are wind on type,curiosity kicked in! Hmmmm on visual inspection they look identical and the fiat piston screws into the nissan caliper nicely? Like i say early days but if they do,fiat rear calipers can be got for peanuts and may be another source for pistons? Going to investigate more and either be chuffed to bits or hide from the laughter???? :der: