Any options for replacing stock suspension

I have a 2007 trd 4 leaf suspension that keeps breaking and wanted input on replacement. I broke the passenger side last week, 2 months ago the passenger side again and last year the driver side broke... I am getting conflicted causes on why they are breaking but either way was looking at replacing the stock. Trying to get get something that doesn't lift the truck too much so it will not create problems of damage in areas of the truck.

Also trying to get it in Canada which is harder. I have looked at downsouthmotorsports for the old man emu but would like something to compare it to or have other options.

 

Old man EMU is hard to beat great kit. You will have to get a whole kit and it will lift it a min of 1 1/2 to 2 inches. for the min lift get the 883s and remove 1 of the rear leafs.

 

OP- Are you heavily loading the vehicle sometimes?

 

On occasion there is 300-500 pounds in the back. I do use the truck on dirt road.

The problem is it is going to cost around 1800 for the full package (leafs, shocks for front and back) no including installing. I just wanted to replace the leafs but it seems the stock shocks will needed to be replaced too.