Quite frankly, as a business person, I'm sure you understand that while you may have items in stock, if we can't get them from our vendors, and they claim it's an issue on your end, that looks bad for you. Let's say I wanted to get my L2 cert, and wanted to use a reloadable motor to do this. Let's further assume I'm on any sort of a budget, which basically restricts me to the 38/720 casing (there really isn't much reason to spend more money on a bigger casing). I'll take a look at a few vendors to see what they have in stock. Performance Hobbies only has the forward seal disk in stock, and doesn't have any reloads. Apogee Components has reloads, but no hardware (only the forward seal disk is in stock). Balsa Machining Service has closures and the seal disk, but again doesn't have the casing, and half the reloads are sold out. Chris' Rocket Supplies doesn't have the casing, but has closures and reloads. Bay Area Rocketry has the casing and forward closure (and reloads), but no aft closures. Of all the vendors I looked at, the only one who had everything in stock was Wildman. The other thing I noticed is that it's not just that hardware has been hard to find, but a number of vendors appear to be having trouble keeping reloads in stock as well - including my typical on-site vendors (I'd rather not pay hazmat if I can avoid it).
I remember it was only a couple years ago that I could go up to a vendor and ask for a specific motor (say... an I357), and they'd have a box full of them. Now I'm lucky if they've got anything that will fit in that casing in stock. It isn't just an issue with HPR loads, either - the difficulty in finding anyone with E and F motors in stock for TARC has also been increasing, which, quite frankly, is a bit baffling to me. The rules for the year practically dictate the popular motors (2 eggs and the F39 will be the most commonly used motor, 1 egg and it's the E28), and since the rules are released at the finals of the previous competition, there's PLENTY of time to ramp up production and ensure a stock of reloads for the next January-March qual flight spree, when those reloads vanish off the face of the Earth.
I know all of this may not be entirely within your hands to control, but you have to understand that all of these issues are ultimately going to impact how AT is viewed as a company, and will push people towards competitors. If that means finding additional machinists who can manufacture to the correct tolerances, or streamlining the warranty process (and prioritizing warranty replacements over orders, as well as better communications with people filing warranty claims), or looking at the market to better predict when demand will be high for certain products, or making sure that your vendors not only have a stock of product, but also that there's a backstock of everything in case there's a production problem, then do all those things! At the very least you'll be improving the company, which is never a bad thing.
I've been flying Aerotech motors for years (that cert special thing you were doing for a while was a hard deal to pass up on), and don't plan on changing that any time soon - you guys make great, high-quality motors and I hope that never changes - just wish it was easier to get my hands on more of them!