The fire at the Lake Charles facility may limit availability from US manufacturers for a while but China is a major supplier also. I bought a big bag from Puritech a while back. Price is still the same which would indicate plenty of supply.
Well, the mailman and the UPS guy live here. Does that count?
I buy my chlorine and acid from my local Leslies, so there's that. I don't believe in their pool care methods, but I still want them around. They have the freshest chlorine and the highest MA %, better than the Lowe's across the parking lot. So everybody gets a cut of my pool maintenance budget...
I get my LC from a local Ace -- dry "stuff", I use a locally owned pool store -- I just have to deal with the eye rolls and the "That's a lot of X" comments -- whether it's the higher CYA or FC levels. I just smile and move on. At one point, I told them my pool was a 100K gallons, so they would stop asking me about it.
I use to order Pucks and Shock from intheswim but they started requiring a signature which is hard when your at work ..Missed one and had to drive to the FedEx warehouse 30 minutes away because they weren't allowed to store it at the local store !