Better than that, give them to the Army and Marines, and start building new ones. Same proven ideas, plus some upgrades. Nothing else can really replace it.
I am the first to claim I am no expert, but this may be about much bigger fish.
The A-10 is great against low tech terrorists hiding in a cave, but I suspect we need the money to buy the weapons we will need against Russia, China, NORK, and the such.
Low tech massive firepower with no stealth is Magic Dragon/Drone material anyway. We NEED to be able to take on the Ruskies, and they ARE spending a lot on a some pretty capable equipment.
I would suggest a picture of THOR AND HIS HAMMER ON THE SIDE and perhaps an upgrade in turbines that are more efficient and allow them more loiter time on target that at this time is really good but could be better. In addition US Army or Marines on the side would look really good.