I need to borrow one to put me pistons back in thought id ask before i buy.

ive got one you can borrow

Edinburgh...

I made my own

Worked a treat too

Bean can cut down the side and a big jubilee clip was the way we used to do it but they are cheap enough to buy for a one off nowadays

ebay link

I have the tool for fitting rings to the pistons without breaking them -- if you need.