All I can say is you have a tough row to hoe. Brand new, USA made, USGI milspec helmets, made by a current military contractors are selling for $400 in today's market. These are the exact same helmets that have collected and stopped scrap metal from embedding itself in our friends heads. We have seen them work. They have lot numbers and trace back numbers.
The holes are drilled in blueprinted locations, so that any standard aftermarket parts fit. The shapes are similar from one brand to another, so sizing is uniform. If I buy a XL Gentex, I know that is going to fit exactly like a XL BAE or MSA helmet I may have had previously.
That extra $50 bucks buys me a lot more than $50 worth of value.
Call me xenophobic, but any gear I use to take lives, save lives, or patch holes in lives is not being bought from China. The very vast majority of it is USA made. Sure it costs more, but I have assurances in the USA market that I cannot get out of the Peoples Republic of China, State labor factory number 47.
Plus, keeping that dollar here provides veteran and others with good jobs. If I have a choice between providing a job for one American or three Chinese, the American is getting the job.
As Wild Willie has noted, there is more to ongoing QA/QC than having one report from one lab on one article.
You may have a great product at a fair price, but at least in this crowd you will not get a lot of interest at any price, just because of it's origins. If it was sourced in North America or Europe, and offered substantial advantage over the competing product it would sell well at twice that price.