mamiya zm battery cartdrige missing - replacement?

[bghomofaber]

Got a nice looking mamyia zm in the mail, with the 50mm 1.7 series E.

The cartdrige style battery holder is missing though.

I think I can mold one out of teflon but I have not much spare time for repairing.

Any idea?

I exclude buying a broken one since it will cost too much to find a broken one and have it sent from abroad.

it's a plastic holder after all.

In attachment the item in question