So without too much research a super 35 is around $1200. possible other option is this link.A Super 35 kit isn't cheap either but it's more than up to 35" tires and it doesn't require that the axle be swapped. Super 35 kits also include a locker. With a Super 35 it'd be more than up to even 35's.
Or for a cheap upgrade replace your Dana 35's axle shafts with aftermarket (like from Yukon) 1541H 27 spline shafts. That'd give you a nice strength upgrade without breaking the bank. If you see 4340 shafts don't go that way, they're inappropriate for a Dana 35.
But as I am not an expert on good or bad drivetrain parts/manufacturers, maybe you could look at this and tell me what you think? Not trying to put you to work,,, and if you don't have the time, or just plain don't want to... your not going to hurt my feelings. My wife tells me I have none anyway.