How can i have a paternity test done when my husband is in mexico?

I am around 13 weeks pregnant. My husband got deported and i need a paternity test done to show the court that he is the baby's father. I was wondering if there was a way of me doing the test and obtain the baby's DNA like written on a paper, for me to then fax it over to my husband in mexico have him have a dna test and then a doctor over there compare them and decide if he is the father or not? that way i wouldnt have to go all the way to mexico