Your audiologist wasn’t being completely honest there. The Soundlens used the same technology and has been out for a while: due to Starkey customising the face-plate, it has a smaller frontal cross section. There’s also the Oticon intigia IIC and the Unitron micro.
Oticon have traditionally made robust ITE, I have had some issues with shell failures on the soundlens and the Unitron is essentially a clone of what you are wearing.
I’m more concerned that you might not be a suitable candidate given your occupation, my criteria above was a bit of a generalisation; but litlle aids won’t do well with lots of wax and sweat. Some people can get away with it, others cannot.