Sounds to me like you guys are possibly using the wrong materials... Bending the links? Obviously youre not doing something right, either tube size or geometry. Or, if you are using the same tube size as what comes in the kit, what makes you think buying the kit would be any better? Also, breaking the stock TREs off? Crossover kits use FJ80 TREs, not stock truck ones. You're using the wrong parts. Just my two cents.
Kits can be built. Just get some arms for a couple hundred, and build off from there with the TREs and tube. The kits usually have a 1.250 OD 0.250 wall tube, and they use 23mm FJ80 TREs. For the pitman arm, simplicity says to get a pitman arm adapter from Sky, that way you don't have to modify the one that hopefully comes on the IFS steering box.
It CAN be done, but after you spend a couple hundred on the arms, then a hundred on tube (depending where you get it of course), and more for the ends, you might as well have bought it in a kit IMO. Price it out and see what you can do! Don't forget about buying the plate to make a frame brace for the box with as well, and don't forget to figure in the cost of getting an IFS box as well.
Sky has a kit on sale WITH a box right now for only $469. Good deal IMO!
~T.J.