There is definitely one company that makes a barrier strip-to-spade lug pigtail adaptor (it's called a Spealunker):
http://www.angelfire.com/biz/bizzyb/spealunker.html
$30 for a set of 4. Good luck. BTW, these are meant more for bananas and plain wire, but I think they should work OK with spades if you're careful.
http://www.angelfire.com/biz/bizzyb/spealunker.html
$30 for a set of 4. Good luck. BTW, these are meant more for bananas and plain wire, but I think they should work OK with spades if you're careful.