Now there may be an old post on the matter but I have never found anything when I did google type searches here or over on NAM. To start, the Gen1 JCW uses a 294mm front rotor and the R56 front caliper that has a 54mm piston (about 3 1/2" of area). Next, Wilwood has several different kits for the Gen1 with the least expensive being a rotor just a little bit larger than the 294's but whereas the JCW has a thickness of .86", the Wilwood is .81". A big cost of any Wilwood kit are the brackets that adapt their caliper to the MINI hub assembly. I am retired so lots of time to research things. I was reading some Miata postings and noted where a guy had bought a Wilwood caliper and made his own bracket to mount them. The selection of Wilwoods that fit the .86" JCW rotor are not that great and it appears that many of the kits utilize a 1" rotor spec. When you go with a 1" rotor selection the options become pretty good. I got thinking about making my own bracket, something that is not that difficult if you use a "lug" mount configuration similar to what I saw on the Miata Forum. With this in mind and looking for something with a bigger brake pad either the 120-13845 or the 120-15254 appear to work. Both are Dynalite types with the 15254 being the least expensive. The 13845 has lug centers of 5 1/4" and the 15254 has 3 1/2". Both have total piston areas of about 4.8 square inches, a 36% increase from the JCW/R56 caliper. There are a large selection of pads with the BP-20s being in the $70 range, the calipers are around $130 and the lines approximately $65. Anybody ever gone this type of route?