You’ve exhausted all your suppliers contacts in Manhattan?
If you have reached the point where you must underwrite your own production run of specialized yarn, first off , congrats!
secondly, start contacting the manufacturers direct to run a lot for you, no need for a middleman, most of the remaining domestic yarn manufacturers have in house sales who will be happy to work with you if you are expanding your business/orders.
http://www.fashiondex.com/silver/fabric/yar0.php
http://www.yarndex.com/yarn_by_dist.cfm
http://yarn.fibre2fashion.com/searchResult.aspx?q=searchByOption&hdnSectionName=yarn&plead=0
/not in the business, family was in schmatta business decades ago.
Thanks for all the input. I’ll follow up on this.