I have 3 Inovelli Aux switches left over from a 10 pack I bought that I do not need. I also have 5 of the Blue series switches that have the signal degradation issue. I have used some of those myself and they work fine when I placed them right next to a new blue without the issue. Your mileage may vary but I was able to use them in my setup and you may as well, or you may be able to fix them as well since there there does appear to be a way if you know how to solder. If anyone wants both the aux and the blue that would save on shipping but I an sell them one at a time as well if requested.
Edit 1 - all 5 blue switches and the 3 aux have been sold