Articulating paper

Can anyone tell me where I can get some of the paper pros stick to your clubs to tell you where you're striking the ball ( heel , toe , centre etc ) when they're fitting you for clubs.

I thought it was called articulating paper but can't seem to find any ( other than for dentists ) on the internet.

Thanks

Alan King

direct golf uk  have some alan

impact tape, or just try carbon paper works just as well