Roger, sorry did not know the history, can't blame the factory in that case.
I would still try and download the map from a similar year and engine 4/4, hopefully someone on TM would allow you to do that. At least then you would have a base file.
However it sounds as if Morgan did something fairly radical in the ECU to fix the pinking problem that resulted in loss of ECU diags and read/write. So just using another 4/4s map may just result in the pinking returning.
There is a thread on TM about Mark Baldwin at Morgan coordinating the problems/fix with the ECU, he may be able to tell you the exact fix he used.
I am guessing, but if they modded the ecu to fix the pinking and you then lost diags I would think they either added extra code (perhaps to adjust the behavior of the knock sensor, some can have a lot of lag) which due to space constraints overwrote the diag code or perhaps they re-purposed one of the I/O pins used for ecu read/write for some other reason.
