I gave up too. My brother was also chasing some for his XA Falcon. He send stuff & $ away but after 12 months got it back (hadn't even been started). A Trimmer I know reckons the science is in the chrome plastic strips (ie: getting them to stick and curve) and even the plastic welding guys can't get it done.
There was a firm in Sydney doing this (general consenous was anyone who advertised they could do repo door cards were just onsending to him). But he can't be relied upon or doesn't want to do them.
A couple of options - I saw that Aldridge in the UK are now doing these for Mk2's - I don't know if there are flat ones or have the curved top (couldn't pick that up from the pics). The pic I saw suggested they were not copies of what we have in Australia - I don't know if the UK ones were different.
Alternatively, there was someone in the UK making firbeglass moulds of the backing cards. Freight could be an issue/cost for something that might be a bit frail - you them have to get them re-trimmed here in Aust and then there is the issue of the chrome strips. All of this sounds mega expensive.