If you looking to stunt it, (and I acknowledge it's a big kite to stunt) I highly recommend Skybond by Shanti.. Great "slippery" lines that minimize
binding with multiple twists.. Decent modulus for slack line work and great responsiveness.
Skybond is available up to 350#. Skybond 350# is what I use on my Bolero 6 Stack. Granted the Bolero is a MUCH smaller kite but six stacked is a lot
of pull..
If you are looking more as a power kite then Laser Pro is available up to 500#. Which is closer to the recommended 485#
For both of those options you'd have to purchase bulk..
Another option is something like the HQ - Econo Quad Line Set for your Fazer lines and use the brake lines separately on a smaller dual line kite..