Update.
Thanks for all helpful replies.........I have since found a cable online for 30 euros, which considering the parts cost/skills required is a better solution for me.
https://kwsseuren.nl/stromer-st1-acculader-verloop-acc-str-ver-st1-36v.html
Thanks @DavidRvR for prompt reply.
Alot like the OP, I'm reluctant to spend £40 / 45 CAD on this cable unless absolutely necessary
Surely it can't be a unique plug/socket to Stromer, can it ?!!