Those brakes are some of the strangest design I have seem. Granted I have not seem 1/100th of what BDop has seen they are different. I can understand why you want to change them out. Do you have a mfgr and level of components in mind? I got a set of 105 Shimano on eBay last year for a great price. Used but not that I could even tell they were. Best of luck in getting the cabling sorted out and new brakes installed.

Bill