I browsed trough your site, and if i get this correct, you're basically building a very, very cheap hardware wallet using a keycard and a keycard reader.
Altough i haven't reviewed your code, the idear itself sounds pretty neat...
So basically, you could buy a complete stick from here
http://www.cardomatic.de/SmartCard-HSM/en for about 60 euro and convert it in a hardware wallet yourself. Or you could go for a 18 euro card if you have a suitable cardreader.
OR you could get the equivalent from a trusted seller at
https://www.ledgerwallet.com, for fifteen pounds. I have one and it works awesomely.
I have one to, a nano, i've been using it for a couple of months now. But still, i think this is a neat project...
The complete sourcecode is only 1041 lines (including blanks and comments), and it seems to be pretty clean, so anybody with sufficient python experience could modify it to suit their own needs... Basically build upon the OP's work to create a hardware wallet that is exactly adapted to their own way of living.
BTW: this is not a vouch, i only quickly glanced over the sourcecode, i haven't really inspected it so far.