Here's the build picture ETI took for me, this is my 2014 5.0TA. Just guessing but it looks like this would be before they tied down the wires, at least I hope so. I've not tried to get to the probes, I have however cut through the foam working on the dump valves last year. Not hard to do, you'll obviously need to watch out for the wires as you cut. I used a sharp putty knife and a razor knife with about a 5" blade. maybe you could break it away little by little with something like a screwdriver. You can just see the upper probe, hopefully it's not blocked by the frame.
Spraying on the new foam is harder to do. Hard might be the wrong word, messy is better.