"A passion for steelhead is a hard ride. It is all consuming. God help the woman, man, or child who hopes to compete for some small claim to the passion in the angler so stricken." Bill McMillan, Forward- A Passion for Steelhead
Looks like you could do the job with a large pair of snap ring pliers with the pins set at 90 degrees to the handle. There can't be a tool that esoteric and one of a kind to do a reel retrieve change out for any reel.