My suggestion is to first do a google search of the part number you're looking for. One of several online retailers (even Amazon at times) may have what you're looking for, and you'll be able to get the best deal including shipping that way. Many of them take your order and pass through the fulfillment to Roger in Austin who ends up being the one drop shipping to you as their supplier. IMO, if you don't find what you need at a local supplier or online, then the Tunze site is the way to order.