It will likely manage that, can you do any decent measurements and I'll print one
As long as you are not desperate i will reproduce one. Pm mewhat measurements do you need?
I could send the bits to you?
Is that part from a table saw height adjustment?
Depends how they're printed, what in, etc, but a print is generally never going to be as strong as a moulded part in the same material.
Do you think gluing it would be stronger then?
You could drill and pin it. Glue it with epoxy
If there's room a steel band around the shank might do it.
PETG might work with a decent high infill (maybe 70%) with a fair few perimiters. it might work.... but not garenteeing it of course!
Vauxhall diesel? Can't you just remove the flaps and blank it all off? Kits on Ebay to do this.