u/Due_Aioli_2643

I'm making my own bag for the front of my Brompton, and I need to buy a frame to use with the front carrier block.

I'm new to Bromptons and am a bit overwhelmed by the options. Everything seems really expensive for some bits of plastic, or it comes from Ali Express.

Any tips on where to look? Preferably available in the US or Canada to save on shipping.