No, your topic is not in the wrong area. It's just that we don't keep track of REM/Real Ear Measurement hardware and software. It is sooo much more expensive that we don't use extra REM equipment such as this Aurical Freefit system. There may be other/cheaper ways to solve the specific problem with fitting your Widex hearing aids.
For those who are curious, here's a demonstration of how to use this REM system. Watch this→ Linked Video starting around the 4-minute mark.
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