Why not just buy it already roasted from Sweet Marias? chicory is hard to roast, so you'll prefer to buy it already roasted. I don't know if Cafe Lobo sells it roasted or not - I'd think not. But call them and ask. Meanwhile, as you are playing around with blending, you might want to start with small quantities. Check Orleans Coffee Exchange or Sweet Marias (better price):
It has a pretty good shelf life. Mix 1/3rd chicory to 2/3rds French Roast. Do you have a large Louisiana customer base? Because most people won't drink that crap. I grew up on it, then discovered "good" coffee and changed my ways!