Hi RLee..,
So that is interesting, attached is a full picture of mine against some floor tiles just to show the difference. I got the replacement from a very well known Pantera parts supplier in the USA and got it shipped here to the UK.
Now it opens up more questions! I wonder if the length is different on yours compared with mine (possibly the same on one side at least)? I recall the inner core is 3.135m long tip to tip on mine.
As for the callipers, yes I did hear the Fiat Dino had similar/same as the Pantera, but also some others used the Girling caliper. I note there is a place in the USA selling a few different types (with/without the handbrake part), so I am sure there are other instances where the same caliper is used.
Adrian