possible Jap to Chin convert

Hi folks,
until yesterday I never gave a Chinese motorcycle any thought
then I saw this: http://atlanta.craigslist.org/atl/mcd/2615071634.html
on CraigsList and started googling
don't lite the thought of 16-inchers
but
really, really like this: http://www.xingyue.us/product_gd.php?id3=499
or the smaller version: http://www.xingyue.us/product_gd.php?id3=183
as on some web page someone said the engines are based on Honda XR
the most important thing I could not seem to find,
if and if so, where to obtain one of them in the US, preferable in the Southeast
if I can find one - new or used in decent condition -
I'd love to put one in the stable next to the XR250s

thanks for all and any help
ev.