Question on driver type RT F/x (RC?)

OK so doing a little bit of research, and I’m looking for a spare driver is from my SRT set, my stereo array is 6.5 ohm MW5805 drivers, and my SDa array is 3.5 ohm MW5804/5805 on the hunt for a 3.5 ohm Replacement driver for my SDA 3.5 I found that the RT F/X RC model surrounds look like the mw5805 driver, but I can’t find specs on them? I’m not talking about the bi-pole rt f/x that came with earlier model SRT packages, can somebody help me figure out what driver is in those surrounds?