Tar Heel there is truly a shortage of products. Golf balls shortage will be apparent soon as well. The cause is a shortage of material to make the balls. My ball of choice, "Wilson Duo Soft Spin," has been discontinued. Titleist has discontinued my other option, "NXT Tour." I found some on eBay. The prices are reasonable, but the shipping cost_ LOL.
Shafts, as you mentioned, are in short supply. I found the best driver shaft for me and bought 6 for all my drivers and weighted them to D1.
We need to plan and be sure we have the best products to support our game—good post Tar Heel, as always.