Do you mean mini mono (black one) ?can be made up for rear but is no. 5 caliper so rotor would need to be 145mm think i may have one some where, so would you want left or right hand lever and what length hose? can swap stuff about and bleed before send

 have u got a rear brake here complete??an how much pls..thx sean..has 2 be black block tho m8 an r they in good workin ordwer an nick..cheers