We occasionally get requests for RP1226 Cables, which are typically used for logging data in large vehicles and/or vehicle fleets. We don’t carry the connector used for these types of cables unfortunately, it seems the most common connector used was Aptiv (a.k.a. Delphi) # 54201416, which is a manufacturer that we don’t currently carry parts from.
That said, one of our marketplace suppliers, AVR Global Technologies, does have a number of these cable assemblies available through our site, linked here: 4 Options, 1226M, RP1226 Cable Assemblies
They also have a wider selection of RP1226 cables available on their site, if you need to make a direct inquiry with them you can see their full list here: https://www.avrglobaltech.com/rp1226-series