I strongly second Jimmy's suggestion to take a look at Global Dorber. I have a couple of the Little Streamer models that I really enjoy -
http://www.dorber.com/flyrods.html
Regarding building rods, I just built this 5' 2wt a couple of months ago. Total cost for blank and ALL components purchased from Global Dorber, including cost of shipping, was $52.00. I did need to add my own thread and wrap finish.
Of course, the finished rod only costs around $110.