I have the Maximum Performance kit but I believe they are belly up now. I also have adjustable shock brackets with "Works" shocks and C&A skis. The sled steered really heavy so I changed the steering bearing to the sealed bearing design also by Maxx Perf. It took me a full season to get the toe out and camber just right but it was well worth it! I tell people it's the sled Yamaha should have made!
I think BETHEVIPER sells a wide front end kit also, you may want to check with him.