Many thanks for the suggestions – and thanks to all others who’ve responded. Much appreciated!
Hamjor1, you wrote “the audi may have a better solution like stepping up one size in the dome, making it unlikely to get stuck in the ear canal even if it comes off.” I’d like to understand this: How would using a larger diameter dome make it less likely to get stuck in the ear canal? (Seems paradoxical, but maybe it’s true.)
Have you ever tried using rubber cement for this purpose yourself? – I’m wondering if it would stick to the silicon dome material.
I checked with my audiologist about the dome that came off: It’s made by Phonak and should be compatible.
I’m still hoping to find a more secure way of using domes. I see the advantages of custom molds, but don’t think my injured ear canal would tolerate one.