m20 adjustable cam gear

[Kershaw]

I doubt you're going to find cheaper than ebay Chinese made, but for quality...

http://www.bimmerheads.com/catalog/m20-adjustable-camshaft-gear/

[abit]

Hi, trying to find adjustable camshaft pulley for m20 engine.
at the moment could find only one style pulleys on e-bay, maybe someone used them, and could say something about them, or give some other advice?
other variant of course is ppf pulley, just maybe there is something cheaper but the same quality.

http://www.ebay.co.uk/itm/2PCS-CAM-GEAR-GEARS-PULLEYS-BMW-E21-E28-E30-E34-E36-318I-Z1-M20-ADJUSTABLE-/262189464702?hash=item3d0bb5bc7e:g:kfcAAOSwAKxWbSGJ