There's nothing hard in building a fixed gear wheel. Sheesh. Buy a track hub. Buy some spokes. Fire up Sheldon Brown and lace it all together. My first wheel, out of the grand total of 3 that I've built was done just that way. It's not hard. Just sit down and take your time.
You can get all worked up about what hub and what rim and what spokes and what colour and what goddess to sacrifice the cat too and all that ****. Go to your lbs, tell them you want a track wheel, but in bits. They'll give you a good hub, even if it's a cheap hub, it'll do the job. The rims aren't critical and I don't give a stuff about the fashion fairies who are currently soiling their tutus - the rim is NOT critical. I've got bloody good wheels with generic Taiwanese rims, bloody good wheels with some lovely old Ambrosio wheels, bloody good wheels with Velocity Aero wheels and some DeepV wheels. The rim makes a difference but it's the way it's built that's important. Just go to your lbs and buy what they use in their workshop. If they aren't willing to support you building your first wheels for your fixed gear steed, find a lbs that gives a ****. Same with spokes, just buy what your lbs uses in their workshop. Straight 14guage has built many fine wheels, and it doesn't have the ten commandments engraved in latin on each spoke.
Sure, some will argue that if you go for 'this' rim and 'that' hub laced with 'those' spokes you'll get a better wheel. Sometimes they'll even be right
But for your first build, you can't go wrong by going to a trusted shop, asking them what they'd use, then taking the bits away and having a go yourself. The worst that can happen is you'll take the sorry mess back for them to fix up. But if I can build three dead straight wheels with no-one to nag me about the process, YOU can too.