need help on research

hi! i’m doing research on a fourteenth century french dress called a cotehardie. it’s a form-fitting dress from the top to the hips then the skirt flairs out, it’s generally a floor length dress (possibly longer). that’s about all i know about it and i need more information. i need the research for a medieval re-creation group that i’m a part of called the SCA (society for creative anachornism). i am entering a competition in january and have to have documentation but am having problems finding anything that i haven’t seen already. although i’m not trying to be stereotypic here i figured who would know about the cotehardie better than someone french! (if that sounds wrong or if i offended someone i’m sorry didn’t mean to) i would appreciate any help offered. thanks! d