Believe it or not .... Wala and Wala XL
What most people don't realise is that if you use or have a movable tow point then you flare the tail out and let the kite skip on top of the wind instead of taking the full force.
Brassington kites are cleaver in that the 2 point bridle is actually a single point with the second point being a restrictor to prevent the tail going too far and having the nose dip into a dive. His trains are all like that and I have flown them in big wind in Cape Town.
Another option is a single point bridled Tri-D, or any single point kite for that matter.
I have also seen and used a locally made kite called a Sky Master that can take double (or more) what you're asking and be used as a lifter. It's crazy what it can do. It's a delta with a middle sled like section. Granted, winds of 60km/h are going to be hard on the fabric and the edges are going to thrash, but it will take it in it's stride.