they'll sell you anything you want & they'll help you figure out what exactly you need in order to achieve what you want...
I currently have a runing tab with them for my ongoing project - & so far I got the FI piston / rod kit (10:1 compression with 2.0L) + M44 Rally cylinder head + 258 degree intake cam + single timing chain conversion + 360 degree main bearing oiling system.
they'll do custom set ups as well, so much so, that they'll actually design a set up from scratch for you according to which parameters you are looking for... I.E. desired dispalcement, compression, cam & crank combos.
they even have euro diesel M47 cranks.
off course, unless you'll have them build you a complete motor (9K) - you may have to find a shop to open up the cyl walls for (all) metric oversized pistons.
call them & ask for teddy.... Metric FTW!

good luck.
I don't think the MM kids sell ALL of the components (at least pistons they state in FAQ's) seperate, although they do seem to sell a variety of components.