These are all great responses...the thing is everyones needs are different. Some want things fast, some want them cheap and we all want the best quality. I'm not a track/kick guy, but the few Calmini items I've purchased for the sami have been great quality, fairly priced and delivered when promised. We all need to support the vendors who enable us to play hard w/ our zuks as inexpensively as posssible. As was said there aren't a lot of vendors doing Zuk stuff (and I don't want a Heep either)!
Just a thought, next time ask if they have what you want in stock and let them know your expectations clearly (credit card charging, ship date, etc.) If they can't meet that, then YOU must decide to either wait or look at a different vendor for your purchase. I've used this approach consistently and have never been disappointed. And yes I've both changed vendors and waited.
We've all heard the saying "lack of planning on your part doesn't constitute and emergency on my part" My 2 cents.