Hi Andy
Agree with you about the GLT price, they have the worst interiors and are lower specced than the SE/LE and sometimes a GLE too.
Original ones tend to crop up occasionally, they seem to be at the opposite ends of the scale though. Either lots of miles and rusty or low mileage garage stored.
https://www.carandclassic.co.uk/car/C1093105
That one looks lovely to me as is but wouldn't be too much work to restore to standard height and put a normal exhaust and steering wheel on it.
https://www.carandclassic.co.uk/car/C1086660
There is this early GLT but needs paint work etc.
https://www.ebay.co.uk/itm/Volvo-360...temCondition=4
Or a full on restoration early GLT
https://www.gumtree.com/p/cars-vans-...lvo/1334058130
Could be a good car after some work.
It might be worth registering to be on the volvo300mania Facebook page if you have it, be prepared to see lots of ruined ones though.