WTB: 4.10, 4.56 gears or front and rear end

[Destructo]

I need some better gears than my 3.40s, if anyone has a set of 4.10's or 4.56 gears for whatever series a 3.40 gear set runs on stock thats what I need. I believe its a 3 series? Or I need a rear end with the same gears, but it must be a locker rear end as this is an off-road vehicle and I would rather run 3.40 gears than sacrifice my locker. I currently have a truck 12 bolt, 8.875" And the axle's need to fit my 85 shortbed 1/2 ton. In other words I don't want any 1 tons that I have to cut and weld on. I would also like them to be located in a reasonable distance if you have axles, I will pay shipping for gears.