Could any members suggest where I can find , online, a mounting adaptor on top of the existing Brompton carrier block ?



Available Brompton bags are too big for my needs. I'd like to clip on the block a small/narrow bag.

There is a German online store which offer an adaptor to mount on top of the existing Brompton block. I could no longer find the thread where a member did mention this site.

Or better, any idea on making a custom made adaptor myself ? Thanks.