Just an update regarding my recent DC plastics purchases. I bought a set of sidecovers and an airbox cover via ebay. When they turned up the larger sidecover just would not fit, the mounting recesses were off by enough that you couldn't physically get a bolt head inside them.
The airbox cover looked like someone had "tidied" it up with an angle grinder.
I sent an email telling them I wasn't happy and the parts were unusable, and after a bit of back and forth via email, they re-did the mould for the sidecover and sent me a new one plus a new airbox cover. All within a week and a half.
As others have stated the parts are not like NOS, and wouldn't suit a concourse resto, but now they all fit anyway.
I suppose my main point is that the service offered could not have been better.