Celiac disease do not know paternal side donor insemination?

Okay, after a long and painful few months I was finally given a diagnosis of Celiac disease. For those of you who do not know Celiac is a hereditary condition. It can also do damage with giving the victim no symptoms of having the condition. Therefore, all first and second degree relatives are required to get tested. There is only one problem. I was born through the anonymous form of Donor insemination/artifical insemination. Therefore, my biological father and I have no knowledge of each other. I do not know which saide of the family the disease came from. The test to check for the "celiac gene" is nearly $500. If it is coming from ym paternal side, then I do not want to have to put my entire family through the procress of bloodwork, and endoscopies. If their anyway to find out from the donor bank if my "father" had celiac disease. Or better yet, (anyone who is able to do this, I will create a bunch of black questions for you to answer and automatically vote you best to give the points.) Is there any possible way to use this condition as a way to contact the biological father. I am under 18, that makes it more difficult. I am desperate to find him, please do not just send me to the donor sibling registry. I want to know who my father is so desperately.