ooh deggy me ode mucker,
you're after a golden chalice with that selection of wheels i can tell yer!
i have just a toe or two in the dub scene, and know that those sort of wheels you've mentioned, whilst they will fit as you say, 4 x 100 pattern, 2mm wobble bolts, similar offsets if from a VAG car, centre bore can be a bit stray but spigit rings sort that too, but the main issue is going to be price!
they can sell for small fortunes wheels like that.
those zenders are nice, and if they are a 7j, you can get some handsome width on them, as a max i'd say 215's, maybe even 225, and go the other way you could stretch a 165/50/15 on to it too.
i think i know someone who has a set too, holla if you'd like me to check.
otherwise, are you definitely going to stick to 15's?
i have some 17's that might be up for grabs shortly, but they're not along the lines of your old skool wish list above, no deep dishes or concaves i'm afraid.
nice to see the car in the oven getting ready, wow, what an exciting time mate!
bet you have an advent calendar for spray time not christams eh chap?