Source for new 7800 cartridge guides?

[SINGLE TOOTH]

I have a 7800 that has the cartridge guide tabs broken off so the dust covers don't open on 2600 games. Years ago, I inserted some paper clip wires into the plastic while the metal was hot.

 

I'd like to fix this machine decently. Anyone know of a good source for these?

[+slx]

Thingiverse has a model you could have printed out.