cheap coma corrector for f4 newt

[graham.hobart]

I want to try and use my f4 newt more often. Unfort I sold my coma corrector with my 8 inch newt. Anyone got a spare cheapish one I could try? GSO or bintel brand etc
could also swap for stuff if need be- I have a cupboard full of stuff
Graham

[Greg Bock]

I have one Graham, I'll send a pic later tonight.