Sorry to hear about your lost gear- that suks.( they sound like good ones)

It did happen to me once while in the aderondacs about 25+ yrs agofishing one spring- turned around suddenlike to look at something & knocked it right in- never did recover it, couldnt see it either. But luckly it was inexpensive like most of my stuff.

Maybe get one of those heavy duty magnets?( dont know if its steel/reel) or not)

We use to make homemade grapling hooks when i was a kid( to catch all the tackle etc -ppl lost in lake erie)

A handfull of coat(steel) hangers( or other stiff steel wire) & 6 in or so piece of pipe- double them over- stuck threw the pipe& then bent over & a piece of rope tied onto the loop formed from doubling over -worked well then & was inexpensive to make & didnt matter to much if they got snaged & lost to..( got a lot of tackle that way)

I hope ya can recover it- good luck.