Help Jude get Leg Braces and walk

Hello we’re Jude’s parents Jeremy and Natalie. Our son Jude was born with T21 (Down Syndrome) he also had a heart that required a few surgeries that we’ve accomplished after two years! Jude is now about to turn 4, and our next life goal is getting this guy walking. We’ve purchased his walker but he needs leg braces. The braces were sized and ordered before December of last year, the process to get them has gone over into this year, Monday we had an appointment to revive and pay for them. They informed us that they have to redo all the billing due to the change of year and detectable. So we’re now in a bind for the price of the braces. We could also use help with some of the therapy he’s receiving to get him walking. Any help is greatly appreciated.