From looking up information on the Krysna Swing I, it seems to be a similar size and shape to the Braca IV 705 the original teardrop shape. You can get the EL version which is the lightest at 19.8 ounces, or some marginally heavier ones if you prefer. I like the softer 19K shaft but you can get a stiffer shaft if you prefer.
Both Fastpaddler.com and Performance-kayak.com stock them.
-- Andrew
Nelo 550L, Streuer Fejna, Nelo Viper 55
Braca XI 705 EL blade, 17K shaft
Braca XI 675 marathon blade, 19K shaft
Braca IV 670 soft blade, 19K shaft