They do all sorts of analyses at Minerva Labs.............and the name might just give a clue to the location.
you COULD try to pull a fast one by suggesting to your local trading standards that some honey you bought was perhaps not quite as it should be and maybe they would like to test it?
Going to any of the private labs, without a contract price and a steady stream of work for them, will be EXPENSIVE.
Rex Sawyer had an assistant who trained with him, a woman. Was it Diana Sweet? If so that might be a door to knock on.