Can't find brushes

[Jus]

I've been hard on my Integy 35T lathe motor in my scale truck and I've replaced the brushes once as I completely destroyed them in muddy water. The ones I ended up with from a shop that was almost 2hrs away and they weren't the right ones, but i sanded them down and now they fit.. I have since found I think one or two extra sets that are a Trinity brand, but I run these motors in several vehicles and want to pick up a bunch so I don't have to worry about spares.. Where is a good place online to find them? I've been having horrible luck with searches and have come up empty.