I've never built a bamboo fly rod, but am considering it. I'm looking for recommendations for a source for blanks who can help me do it right.

Do a google search, you will find many sources and much information

Like Phil said, google search, there are several sources in the USA selling some good blanks, they are expensive compared to carbon or fiberglass. One word of caution, stay away from the ones on the @#$%& site where the price is to good to be true, you will regret it.

Bamboo is kind of my specialty and since we are close ennough to each other I can help you out. Drop me a message

Michael,
I have only purchased one bamboo blank and it was from Johnny (RIP) at Anglers Roost. His were quite affordable yet not the quality many would be looking for in a cane blank. One of the things I learned is to make certain the bamboo is “heat-tempered”; without, the blank will “take a set” when flexed in one direction and then “take another set” when flexed in another direction and so on. “Flamed or flaming” is not necessarily the same as tempering.

Mark Talmo
FISHING IS NOT AN ESCAPE FROM LIFE BUT RATHER A DEEPER IMMERSION INTO IT!!! BUILDING YOUR OWN SIMPLY ENHANCES THE EXPERIENCE.

I've done searches, but I was interested in comments from those like Bill and Gary offerred. Thank you!

Hook & Hackle carries a number of split bamboo blanks, both offshore and US-made. However if you have the budget for it, Sweetgrass Rods in Montana makes the best on the market! They specifically went to the Tonkin region and hand-selected their cane and they are fanatical about the quality they put into their blanks.They are not cheap, but they are heirloom quality!