I just read through the thread "Affordable PR". The author purchased his G&P built out w/TM M1A1 Thompson for US $598. UN Company is another AS seller (located on the Island side of Hong Kong). I have been to that shop and purchased items there before. The shop itself isn't large physically but the owner keeps it well stock. He seems to be taking a price leading approach to selling the G&P PR on the Internet. So, here is another source for the G&P kit -- UN Company.
"We few, we happy few, we band of brothers...For he today that sheds his blood with me
shall be my brother."