We have had a large # of requests from this board to advise when these little beasts become available again.

When we bought out a former Cox supplier, we lucked out as they had a box of them in the mix.

Here they are at ½ the going rate, as an introductory price 

http://coxengines.ca/product.php?productid=302&cat=4&page=1

Bernie and Xena