how to make a Bail Hold Support Guard for my old Stella 10000FA

[Cost_spin]

Hi guys,
due I didn't find a spare part for the item in subject, I think here there are people who make things by resin/meta l/.. et so on, so I try to ask for any tip about building myself a proper guard.
Resin, metal or...I don't know, I only know I have to use something I could model around the site.

Thanks in advance 🍻

Costas