Yes, it's hard to get these cartridges and i know,anyway i willl try it here...
if you are interested,i look for every Nes prototype ,but I use paypal only for payment ( no confirmed adress, sorry i form canada...). Also if you know other place like Ebay...please contact me.
(((Im really serious, i dont have any negative Feedback at my ebay account)))
I bought in the past a prototype form ArmyX,(Terminator 2)
Positive feedback have been left...
So don't worry deal with confidence!
http://cgi3.ebay.ca/aw-cgi/eBayISAPI...&all=1&rows=25