Don't need to, just go to ChunkKing Mansion on Nathan Rd. in Kowloon, Tsim Sha Tsui, and you will find over a dozen alone just in that building. It is the haven for foreigners from underdeveloped countries, and has loads of cheap visa agents. Also has loads of guest houses, costing as little as 50 HK dollars a night.

There are others, but they cost more. However, if you must have specifics, just use google, and do your own research, I am not your research "lackey". You have all the info you nbeed, take it or leave it. I suggest you go to Chungking Mansion. If you choose not to, than good luck, and good bye.