Can't you just use 200B brakes? The 200B Girlock brakes are cheap, readily available and they pull the car up fairly quickly.
that is what I used !
Whats the go with 200b brakes? is it a case just bolting the calipers on? are the caliper mounting holes different? do I need different disc as well?
that may just be what im looking for
if you were to run 200b brakes you would need to use the complete 200b strut/hub/disk/caliper nothing is interchangable with early 180b and 200b brakes, also 200b inserts are 20mm shorter so your inserts will be no good and if you use your current springs it will lower it another 20mm which can be a good or bad thing,
best bet is to find some late 180b struts, your inserts will fit after all theres quit a few 180bs out there