Marantz RC5000i Universal Remote Control

Hi Everyone,
I still own a Marantz RC5000i Universal remote control. Over the years I have heavily modified the macros and layout to tailor my own needs perfectly.

However a few weeks ago, the remote complained about a corruption of the code a reset itself to factory default. I have backed up the config, but I cannot find my PC connector cable anywhere. I have tried in vein to find a replacement, but as this unit has now been discontinued, I am finding it difficult to source one. Has anyone any idea where I might purchase a cable (preferably in the UK).

Thanks
J