Ebay Tropentarn, and youll get a limited list of what can be found. Various trustworthy military gear sellers will have some knockoffs on there typically. If not, wait a week or so and search again.
You said you don't want to wait for overseas, but
www.flecktarn.co.uk is the defacto place to get anything flecktarn.
Also, when searching Ebay, search Flecktarn, Flecktar, Flectar, and German Camo (will mix a lot with the WW2 stuff though so its a little harder to filter through). Good luck, but its the best option.
Sometimes sportsmansguide.com or cheaperthanddirt.com will carry tropentarn stuff, search for fleck, or flectar, go through the list of misspellings basically.