I'm really starting to see the use and need for a line-counter reel.
There are definitely advantages for mooching, vertical jigging and shallow trolling (Columbia springers and Buoy 10 fall chinook to name a few)
Robbo Endsley is a master in the use of line-counters and when used in conjunction with his Lowrance Electronics, the line-counter becomes your herring "guidance system" to make a surgically-accurate presentation to provoke a strike from a wary chinook!
Lefty line-counters are rare simply because of the availability of those little three-digit counters, the vast majority of which are driven from the right side of the case.
When you couple that with the lack of demand for left-handed reels in general well, as they say...
"There's your problem..."
That, and the fact that people who retrieve left-handed are just messed up to begin with..
Check with John Martinis of John's Sporting Goods in Everett!