I see that Golfworks has, in it’s on-line catalog, the NEW 450 and 460 ES iron shafts, but not the 760 and 780 ES models. Will they be added later, or can they ordered special through Golfworks?
I ordered one just a few months ago, so I did a search on GolfWorks for the 760/780 ES and found that they do still have them – http://www.golfworks.com/ust-mamiya-recoil-760-780-es-graphite-iron-shafts/p/US0099/.
As you can see, both the 68g regular flex (F3) and the 82g regular flex (F3) are on backorder. Since they were new in 2016, I think they’re probably just out of stock and they will get more in, but if it’s being discontinued, the web site will still say “backordered.” Customer service should know if you’d like to call them today – 1-800-848-8358.
Hope this helps! Michael