Ok i'm sorry i may be wrong. I looked at mitsubishi's website and it looks like any active shutter glasses will work with the TV. You have a choice of DLP Link glasses or IR emitter glasses. DLP Link will say so on various websites, and IR are what Sony, panasonic and Samsung use for their glasses. With that said if you want to use IR glasses from Panasonic you need the IR Emitter to go with your mitsubishi. It's included in the 3D Starter kit they're selling. From your first post it sounds like you may already have it though.
Simple enough test if the Samsung one's sync and work I don't see why any other brand wouldn't...buy some take it home and test it, if it works great, if not than return it. I'm sorry i haven't been able to find a straight answer either way. It says that IR glasses should work, so theoretically they should, but you know how technology is, it's never as easy as they claim it is.