Technically they are government property and you shouldn't sell them to unauthorized personnel, but thrift stores and surplus stores will generally buy them, especially if they are near a base.
Try eBay or an antique store.
There are several online sources where one can shop for Navy uniforms. Navy Exchange, Marlow White and Military Uniform Exchange are websites where Navy uniforms are available for purchase.
The Yankees home uniforms are white with navy blue pinstriping. Their away uniforms are gray with navy blue lettering.
Active duty Navy, Naval Reservists, and Navy Veterans (assuming they can fit into their old uniforms) are authorized to wear Navy uniforms. For Veterans though, their discharge must be under conditions other than dishonorable.
Fatigues
No. Brown. The navy and air force had blue uniforms.
One can shop for navy uniforms when one goes to US Navy Uniform Shop or Uncle Sam's Outfitters. One can also do their uniform shopping online by going to the official websites of these shops.
Its white yellow and navy blue
You have to make the uniforms then sell it so your group members can buy them.
navy and brown/tan
Nothing in mainstream media but all over the web...
They're mostly patterned after Navy uniforms, though there are some uniforms in the Coast Guard which are not common to the Navy, such as the all black BDU uniform.