Hi Gregr,
yesterday I’ve got reply from Gates.
Unfortunately it turned out that I sent the request to the wrong department - to that of Gates Carbon Drive (these belts are dedicated for bicycles only).
Just the HTD belt type used on Strida is actually an industrial belt.
It seems that neither Gates nor Continental ever accepted that their industrial belts are in use for at least one folding bike, too. 
The request will be sent again asap, but this time to Gates industrial support.
I do not think so because the snubber does that already and there is no reason not to keep that part.
Agree fully.
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There are two belts available for Strida; the shorter one shown above is 1360 mm long.
The longer one, used for single speed Strida and EVO has 1440 mm - perhaps that’s long enough to allow the additional roller. -
There is no chance to get custom made belts; belts are generally made in certain length steps and certain widths. All one can do is to cut their width accordingly.
Strida dealer in Austria:
As far as I know there are just two - and they are in Vienna.
This is actually a good friend of mine; therefore I can tell that Mike does not at all like to sell bikes via internet. He’s an old-school type of local dealer; he wants the customer to try the desired bike before buying and he also wants to explain and adjust each bike together with the customer.
The other one is Tom; of course I know him also personally but I could not tell if he sells online.
Please tell your friends to ask him by themselves.
https://www.2rad-shop.at/index.php?page=strida
Generally I can not recommend to buy a Strida bike without having ridden one before.
Kind regards,
Chris