That single page flier is what I saw in newspaper print.

Given how few I have seen I reckon it has to be very limited build. Dr Terry's is the only one I have laid hands on. Using an example of say around 600 of each of HX LE and HJ GTS coupe, these were everywhere and I personally have probably touched 20-30 of each. Whist 30-50 might be a lower number than actual, I'd be surprised if there was more than 200, but you never know until you see GMH figures.

As trim was made to order for each car in the schedule it doesn't have to mean that lots of variations mean lots of cars. Does hint that I agree but doesn't prove it.

All auto hatchbacks had it, was just a button that you pressed down, same shifter as a T-bar just unscrew the hatchback one and screw a HQ-WB T-bar on. I had one on my 2/76 SL hatchback, took it off 2 days after buying the car. I have a NOS one here somewhere still in a box unless I have thrown it away, can’t remember.