OnyaxeP, I'm 69", (and shortening, with Age) I have A Brompton M3L , Ergon GC3 grip upgrade,
and a medium sized bike friday [56 top tube] Pocket Llama.. they make 3 size TT lengths ,
to suit rider's sizes
You will be able to order a Brompton H which will offer a 6cm taller handlebar than the M,
due to a steering mast redesign. next year, they promo'd it at the Eurobike trade show.
I have no clue about the rakuten, I guess you don't either.