Having recently bought a Clearaudio TT, I needed a dust cover.
I trolled around the web and found a seller on eBay who offered a range of sizes, hinged and non-hinged, as well as bespoke designs. I measured mine for rear access cut-outs, side handles and did a very rough sketch (i.e. more or less literally on the back of a fag packet) and they did the rest.
Received mine and put it to use last night and I couldn't be more pleased.
The cost is also very, very competitive - an identical item from Clearaudio or specialist hi-fi shops clocked in between £120 and £180. Mine cost me £83, including shipping (in packaging that would have withstood a tactical nuclear strike).
The company is PR Displays and their wares and contact details are at the bottom of this eBay listing (from an arbitrarily chosen item of theirs) - I can't recommend them highly enough:
https://www.ebay.co.uk/itm/High-Qual...8AAOSwax5YvB7y