I know they make swingarms, dont know if they make to order. Could ask them I guess. Prefer someone in the EU though. Since Brexit I have to pay over 30% import and handling fees from anything that comes in from the UK. Worse than that though, if I send mine to Metmachex THEY have to pay UK import charges on it... and even though the swingarm isnt theirs, they wont get that money back.
Not sure if these guys do custom work, but you could ask: https://www.chassisfactory.nl/en/ These guys certainly do custom work: https://www.bakker-framebouw.nl/?lang=en
