Citroen Picasso,
but you'll need a BE box form the picasso, modified internals and not sure but probably custom rods to suit [as the picasso is cable shift i believe? possibly hydro clutch also?]
picasso hubs machined down to suit the saxo bearings/struts.
custom fabricated battery tray / gearbox mount to suit the BE gearbox mount.
custom driveshaft (sleeved is cheapest option) as the picasso one(s) are longer than the saxo/ax.
few other odd's & sodds but thats about it tbh.
best bet it to stick with MA shafts unless you plan to run boost and launch hard
