-
No problem. @Belgian-Cat yeah the 'Brompton' chains are just SRAM PC8X0 chains, where X = 3, 5, 7 - don't remember which, but all work.
I've also ended up with similar chains and have used KMC 8-speed chains and links. Also ran a single speed 3 3/2" before and the only issue with it was the quick link pins being too long and hitting the jockeys. The chain itself was fine.
@crow ^
7-8 speed is the norm, but I would imagine any 3/32" quick links would do. You probably want a link that matches your chain though. @Belgian-Cat