Where can Benedryl suppositories be purchased (over the counter)?

I'm looking for Benedryl suppositories in 50mg dosage size, over the counter. CVS didn't have them, and since during a food allergy, I experience violent vomiting, pills don't work. Epi-pens cost almost $85 to refill with out insurance, and since my throat doesn't swell shut, it isn't extremely necessary to have, but I do need to get 50 mg of Benedryl in me to prevent the hives,itching, ect that comes later afterwards. Thanks!