I fitted the XR8 Metal flap kit. I had an engine management light on and checked the Disa flap and it was missing. So had to remove the manifold, etc. to make sure the flap & pin was down there. It wasn't, so unsure where it had gone. Fitted the flap and the quality was second to none, with the pin running through the whole flap and not just the top bit.

Also, just so happens the company is only based a few miles away.