I've dealt with the Government on a number of products.
Here's some free advice:
1) Don't give up. The Feds spend a trillion dollars, someone will buy it
2) Don't give up. The person telling you that you can't sell it is jealous, stupid or lazy
3) Don't give up. It will be hard work but in the end, if you are successful it's sweet
Rgds,
G23c