Kirkman labs does state that magnesium glycinate and intravenous Vitamin C are the two products that remove aluminum. Kirkman has a powder and capsule form of magnesium glycinate you can order from their website. You need to look under their chelation line of products. If you are chelating with DMSA, you should ask your physician if your child should take it on the off days or on both on/off cycles. Most physicans want you to stop taking mineral supplements on the days you are using DMSA.
You would need to ask your physician about using IV Vitamin C, the other alternative. If your child is anything like mine, waiting patiently with a needle stuck in their arm is not on the top ten list of favorite things to do. I vote for the least invasive alternative.