Remove Maillard freewheel
You're probably not going to find the freewheel remover for a reasonable price easily for this freewheel (and its probably going to be a 1-time use item). Though it probably doesn't hurt to ask around.

It looks like you cut the hub out of the wheel which was a big mistake -- it makes it a lot harder to remove the freewheel from the hub. 

Anyhow, you can follow the usual destructive freewheel removal instructions (for when you don't need to reuse the freewheel and don't have the correct tools). Basically, you'll use a punch and a hammer to remove the bearing cone and then take things out as they fall out. Then, use a vise to remove the part of the freewheel attached to the body.