Cheers for the replies!
After much searching its "pull type clutches" not cylinders, there are certain r33 skyline parts listed as pull type clutch cylinders, however this is the way the clutch operates, not the cylinder.

Minirotty - Thats what I have gone for, the only reason I was looking else where was because the website I saw the willwood one on had the dimensions all wrong and it sounded way to big for the application.