More then likely the bumper brackets for the front will work. Those are just those wierd diagonal U brackets from what I can remember. I thought that was common to all kits, but I've only really seen a 99 kit so no idea really.
The Rear bumper, I have no idea on how they are going to differ, but I mean if you don't want to dick around with it, I'd talk to the Body Lift company and see if you can pick up a set. If you want to go the cheap way, try and make the kit ones work but know they might not even be close.
1999 Ranger XLT -- "Project Unknown"
2010 Subaru Impreza -- "The Daily"