I' am in contact with some of the main folding bike frame manufactories in China. Regarding the mentioned brands, FSIR, CRIUS, LITEPRO, FNHON...... if you guys have any question, I would like to help you to get more information.

Can you provide contact details of LitePro or shops that deal with LitePro Wheels?
I am looking for a 16 inch 3 speed backwheel for a narrow frame (106mm width), that doesn't have a rear derailleur hanger. One possibility is a gear hub or a 3 speed cassette with an adapter as rear derailleur hanger.
Any suggestions for possible suppliers?