4 channel amp speaker terminal, where to find?

Just finished up this arc ks300.4 and was doing load testing when to my horror, found a completely stripped speaker terminal.

Used to be you could find parts for Clarion amps on pacparts that were drop in replacements, looks like not much is left on there 🙁.

Considered re-tapping them all a size bigger, but meh. Scoured the internet, coming up empty. Would really just need one of the bottom terminals, they're just glued into the plastic housing from what I remember. I have spares of the power side, but nothing for the speaker terminals.

Any ideas where to find something? 🙂

Thanks!
 

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Yeah I've re-tapped the ks900.6 speaker terminals many times, they are always stripping out. Never seen on the bigger terminals on this one. It would be kind of gross sizing these up too.

Looks like a pretty common 4 channel amp terminal, unfortunately I don't see an obvious place to get one.