Unfortunately, thats likely where this industry is headed. To many dealers refuse to understand, they are in the service industry. Yeah we get a lot of PITA customers that waste a ton of our time. Key is to figure them out quickly and politely explain that you have to get back to work.
Most understand that parts men/mechanics time is expensive. If you want to talk, the salesman is right over there...
Stihl dealerships have to prove to their customers they are worth more money for a reason...service, service, service. I do not understand the mentality of not ordering for days, let alone weeks at a time. I hold back on chains, bars, misc stock parts, just for the fact when a customer walks in and needs a $10 part that I do not have in stock, I can add in 25 or so 84 DL chains...hit my min. order/freight and have that customers parts in the morning.
Granted there are times that I can't. I explain to the customer that I can get it next day, but he's paying the freight or he can wait a day or two and not have a freight charge. Those that need it, pay it...but give them the option.
Otherwise, why not just deal with box stores...order your parts online. Sorry, thats not the service I expect personally nor is it satisfactory for my customers.