fender supports for a bagged silverado stepside

what is everybody doing for fender supports on there stepside beds.
i have the 2 bottom factory supports on but my bed side is still flexing to much
 
 

bump

You should post some pictures of how your truck is set up. I don't quite get your question. If you need more support you can either weld in inner wheel wells... or maybe just some rod supports like the bottoms. I'm guessing that's what you're talking about

 this is the only pic i have right nowbut i need more support on the top of the wheel opening. i can't weld to it b/c the bed side is plastic.   I know there is about 5-6 bagged new body syle step side trucks on here  and i want to know what they did to keep it from flexing

What do you mean by it flexing on you? Mine doesnt flex at  all im laying on 22s with 265/35 tires!

the fender just giggles like a fat lady.   when i am driving you can watch the fender giggle.also i dont have the original black plastic fender tubs.  i havent tried them on but it doesnt look like it will work.

i dont have the fender tubs either. Theirs a bolt were you took off the plastic side step that holds the fender in place if thats missin that could be a problem or the plastics that go on top of the bed those you need to have on. Only other thing i could think of is to chk all the bolts that hold the fender in place on back of the bed. Or chk the blk rods they might be in a bad place making the fender giggle.