Refrigeration?
I have purchased HCG at a pharmacy and it was always kept refrigerated...before constitution of the sterile fluid with the hcg powder.
Try the vet route. 'Aqua HCG' is available...cheap...yes, it is Human Chorionic Gonadotrophin, and , get this, it works in fish via an injection into the fin, I believe. No shit check out a vet website and you will see.
I can get HCG for 8 bucks US for 10 000 iu. two bottles- bacteriostatic water and the powder. that is from a vet pharm, bought in person, in Korea. Oh...and that too is kept in a fridge, and when I buy it they put it in a bag with a chunk of ice to keep it cool. I have read that it needs to be refrigerated only after mixing the two vials (hcg powder and sterile fluid), but if it is otherwise it may explain why sources dont carry it.