I bet the two stroke one on Ebay is the same as the V4 ones Andy. He could measure it for you to make sure, otherwise you will be looking abroad for one as we obviously did not have V4 dash ash trays in our motors.
Yes, that is the one, odds on it is the same size, worth checking however. The colour /finish will be different but it might do until you can pick one up of Tradera or on your travels abroad, SAAB Klubben etc