I honestly try to shop other places, but man, some places are just bad. I've asked a few places about Bubble-X, at least two of the places said something along the lines of "I've never heard of it and I've been doin this ## years." When I asked Grimco, they said "oh hadn't heard of it, who makes it, maybe we can get it?"
I tried ordering polycarbonate from Polymershapes and they were charging me more than I retail it for, and then said they had to bring it in from Florida. Lairds plastics refuses to acknowledge they'll delivery in my area and want to charge over $50 for courier. The list just goes on and on.
I have my complaints about Grimco, but they are miles above other places in customer service.