Making Roman Shades
I do not have any specific patterns for making top down/bottom up shades yet. My most detailed step-by-step post on making a regular flat shade is this one. And this one has info on measuring your window for inside mount shades.
These Youtube videos are also really helpful.
As for supplies, I've been able to findflat pulleys here along with most other supplies such as cord, cord cleats, cord lock pulleys and lift rings.
Hope that helps all you DIY shade makers out!
And stay tuned. I'm working on getting up some video tutorials and detailed top down/bottom up posts. As those are completed, I'll announce it on my Facebook page.
UPDATE: A reader pointed out that the woman behind Terrell Designs has posted on her blog that she has retired from the biz.