My LBS does not carry fixed-gear/single-speed parts. What next? Question Changed. See Below for Original.
My local bike shop neither carries fixed-gear/single-speed parts nor is very knowledgable about the topic.
Should I find an online storefront to take its place? Or try to work with my LBS to get the parts I need?
Original Question: Online Shop Suggestions for Fixies/Single-Speeds

I'm looking for a reliable online shop for fixed-gear/single-speed parts. I have a frame and fork and am wanting to buy new, quality parts to complete my first build. Any suggestions?
Looking for (EDIT):

Fixed/Free wheel-set, cogs and crank.
Shop specializing in, but not limited to, fixed-gear/single-speed parts.
Quality customer service by email or phone.
A local bike shop with a good online storefront.
Prompt shipping.
Ships to U.S. (Texas)

I've tried my local bike shop for these parts, but unfortunately they were not very helpful after mentioning single-speed (they were cool about it, just uninformed).
Your local bike shop may not get it with fixed/single speed but do not discount them entirely. They can sometimes compete on price better than a mail order company simply because they will not be charging you shipping even if they have to get parts in specially for you.

Most bike shops have at least a couple of regular suppliers and these suppliers will almost certainly have what you need. Also, there is always the option to get spare parts for a particular bike. If you like the wheel set that comes with a a e.g. Specialized Langster and the shop do Specialized then you can ask them to quote you for a replacement wheelset. The same goes with Kona/Giant or whatever it is they do stock. With some brands these replacement parts are surprisingly competitively priced. Give the local shop a go even if they do need extra prodding and, if they are any good, they will give you service that the online box-shifters never can.