Here is a RFQ for organic materials or bamboo for t-shirts.  
They are colored and have the following:

Single stitch
sizes s-XL
quote 500 each size mens and womens
10K annually
Looking for various neck styles so maybe quote two syles
FOB USD Austin Texas
less than 4.5 oz
Need quote by June 12th.

Please quote me at sisiliasm#hotmail.com.
I'm currently in Beijing.