FastTech has 11 different priced clones available in various colors each (silver, rainbow, black and gold), price ranging from about 8-14$. The actual manufacturers aren't stated, except for the Kindbright, so I can't tell for sure, how many *different* manufacturers/clones there are.
I have a baked blue (14$) and a silver (11$). A black (8$) is underway. All come with bubble glasses and spares.
Although the blue one is already very good, the silver one is really astonishing for a clone imo. Good orings, buttery smooth threads and a really nice topcap. The screws could be a bit better though, and I think the airflow is a tiny bit louder, without being irritating however.
But I admit, that I might just have been lucky, as I don't know if those clone companies take quality control as serious as Reloadvapor does.