I think you're out of luck on getting one skirt. I got a Klingon last year. Even fitted correctly, it's very tight and one of those skirts you want a friend to help put on the first few trips. I couldn't imagine trying to stretch it 4 inches beyond recommended you'd need a winch and then might not be able to get it off if you flipped.
With the Klingon you want to be sure it's properly seated all the way around the rim when you put it on since the extra flap fits somewhat tightly. I'd be very concerned about implosions with a skirt that much under recommended. Having said all that, I'm very happy with the skirt - it's exceptionally dry.