Spare plastic part of racket holder of superstringer S90

Hi,

I’ve been using a superstringer S90 for like 2.5 years and have been very happy with it.
However recently a plastic part of one of the 4 racket holder has broken (split in half and cant find the other half) and I was wondering if anyone knows where I would be able to get a spare? I’ve also already send an email to TennisMan.dd were I bought the machine, without getting a reply yet, but it doesn’t seem to be sold there anymore either.

Images of said part, last image is a non broken one for reference.

Hopefully someone knows where I could get a replacement.
Thanks