Hi Timo,
does she need higher than M-Stem plus M-Bar? That will indeed need drastic modifying (because folded the m-bar already nearly touches the ground) inclusive cutting the steering stem and adding a shim and a clamp and so get an adjustable stem. Some time ago on ebay was sold such a mod. Steve Perry does such things, he also puts a suspension stem which is perhaps not necessary. (Len Rubin has put a suspension stem with parallelogram which is farer from the body.) I am sure a gifted frame builder could do also. Here are some pics to get the idea:





If she needs a lower position or a nearer or farer to the body that's easier: try the s-stem or or p-stem with other high riser bars or use clamps like Little Pixel did (eg. syntace or aberhallo, search for Little Pixels threads on that) or bar with more backsweep.


@bhkyte
hey, that's fair enough if you think its too much need to modify:-)
you are right, its difficult, expensive and complicated
I just wanted to add the SA-hub for correct info. Also you are misinformed about some minor points in mounting the SA-hub to brommi: a brompton 2spd stock dérailleur can be used, no modifying needed here, its possible to use the brompton stock 44t chainring (with admittedly high gears then) plus the stock cranks, a 19t sprocket fits in the rear when used with the hub.