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I just made my Porta Pros wireless. I soldered on a TRN BT20, and glued the receivers on the frame. My soldering was pretty terrible, I may end up redoing it. They work well though, the mic is clear, and the range is good. I've heard that the official wireless porta pros have terrible range that doesn't even always reach to your pocket. These worked from a few rooms away. They also don't have the wire going between the cups like the official wireless model has.
I improved the soldering on my porta pro mod a bit last night, and I made the cables removable. I don't have the two pin iem jacks that I ordered for it yet, so I made my own with some breadboard cable ends and a pair of pliers. Now I can unplug the bluetooth adapters if I want to use it with a cable. It's a much sturdier connection than soldering the wires directly to the pins.
Apparently these bluetooth modules will only work with devices that support BT5.0, so it won't connect to my desk phone at work. I'd like something that supports pairing to multiple devices simultaneously, but this works well for listening to music from my phone.