Have you absolutely ruled out that Photographer's Formulary won't ship glycin to Bulgaria? It might be worth phoning them to see if there is any way to get it.

Alternatively if you investigated whether the chemical is legal to mail or fly with, perhaps if you know someone going to the United States or Canada soon, they could have the chemical shipped to them and then have it forwarded to Bulgaria (or bring it home on their flight).

Photographer's Formulary will ship glycin internationally, to Canada at least, so it's worth investigating. I buy 100 grams every few years to mix up nine litres of Ansco 130 stock solution. (And no, nothing else is like a glycin developer, so while the market has spoken, it has not spoken correctly from my perspective.)