Both last certified in May of 2014. One manufactured in 2012, the other, 2010. The newer one is recertifiable through Firebottle, the older one, not. I'll be reconfiguring the Midget's system later this year, and will be starting with a new bottles.
You'll need to pay shipping, but if I can get $250.00 for the pair, I'll throw $50.00 to the site.
PayPal's preferred, PM me if you're interested.
Chris