New Safe Car Seat for "Rhett Man"

This is Rhett Bozeman, I have watched this kid grow and he has over came so much, more than what the doctors say he would... His mothers name is Karrie Williams and she is a single mother trying to raise him and his 2 brothers... Rhett is growing fast and out growing his current car seat and Karrie is having a hard time finding one that is safe enough for him, she has found safe ones that would work but the cost if more than she can handle alone... The cost range for one for his needs are around  $500-$900 dollars... Karrie would never ask for money from anyone because she is just that kind of person but I love this girl and I wanted to do something and try to help get this sweet boy what he needs...