Try calling the Ram Man. He's an expert on brakes and can tell you what you need, and may have one in stock. He's real cool to talk to and will teach you what you need to know...
7200 Winters Street
Fort Worth, TX 76120
Store Hours: 9am to 5pm CST
(817) 429-0105
http://www.theramman.com/
I met him at an old Indy show and he hooked me up with what I needed to convert my 66 Valiant wagon to manual front disc and rear drum with a dual reservoir M/C. He had the master cylinder and prop valve that I needed.
Then I went to the Fine Lines display right next to him and got all the brake lines to connect it all... Just haven't gotten to it as that one is on the back burner and buried in the back of the garage...
But he's a real nice guy and very helpful. I've had others thank me for recommending him...