seeking connection cable for RK07 drive

Hi all, I finally got to set up my PDP-11/34C with TU80 and two RK07 drives. Given the space in my "museum", the RK07 drives are not immediately next to the 11/34 rack. I am looking for an RK07 cable, part number 70-12292-25 or 70-12292-40 (25 or 40 foot length). The cable *looks* like the RL01/RL02 cable, but is not identical ! You can use the RK06/RK07 cable with RL01/RL02 drives, but not the other way around, because the RK06/RK07 cable has a few extra pins actually connected (which the RL drives does not need). That's what I've heard long ago ... If you have a 70-12292-25 or 70-12292-40 and no longer need it, I will gladly pay or trade for it. See my website (www.pdp-11.nl) for the "spare boards" list, although it is not up-to-date / correct. TIA, - Henk, PA8PDP.