Some of the Spiral Solutions products have protein; however, it may be a good place to start your search--the developer, runnerchicki on nc.com, lives in Colorado.
Another brand to examine is Curly Kinks. They are made in my area (a suburb of Philly) and are protein free. Our dewpoints can be in the negative numbers in the winter, so they might be good for you.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; DM MiraCurls Curling Gelly; UFD Curly Magic; Shescentit LIs; Sevi conditioners; Botanical Spirits Puree, CJ Repair Me