So I have the reply from Barton1972, see below:
Hello Matus,
Sorry for the late reply, we had closed the shop over the Chinese New Year holidays.
We do not custom our straps due to our extremely tight production capacity. However, we will keep your suggestion in mind for our future designs.
Thank you for your inquiry, feel free to contact us if you need more details.
Sincerely,
Barton1972
I am not discarding them as an option yet, but that would mean that I would have to find a very skilled person who could customise their wrap for me. Whether it would be economical (I live in Germany - costs of skilled manual work is very high here) is an another question.
I will keep looking for other options.