don't the commercial guys use a bait threader hook set up that uses a lead "wire" to thread the herring or anchovy on? its soft lead so it can be shaped any way you wish and the hook is attached with a wire or mono thru the hollow lead so you never lose the lead. that should solve the issue.

maybe go ask some of the commercial trollers either in Alaska or closer to home where they get them. I know there is a fisheries supply place in Ballard that still sells gear, not sure if they have those or not.