Of course we know a stock CZ 8 inch coil won't handle trash well so the 5 inch hockey puck has been a big seller over the years...As newer Fisher units handle trash better with a stock coil may not be a big seller and be cost prohibitive for Fisher to manufacture..Heck call Fisher and get it from the horse mouth so to speak...perhaps if enough attention is given they may indeed take the plunge...I know Garrett never came out with one because they couldn't fit all the guts of a GTI in it, but doubt that is the reason in this case.