Hi
I have images of about 40 modern Chinese weights on my website, the pictures being taken from a Chinese factory website about 18 months ago. I did find another Chinese factory page with lots of millefiori paperweights that looked just like some you buy in Murano (incredibly similar...), but I couldn't copy any decent quality images. I asked about prices, and was quoted from 50 cents to US $ 3.00 per piece (depending upon design), plus shipping, provided I took a crate of 300 similar items.
See
http://www.pwts.co.uk/ then 'Identification' , then 'Modern Chinese catalogue'.
Regards
Alan