new floor mat

I think this is the stuff http://m.homedepot.com/p/QuietBrace...ctural-Insulating-Sheathing-3103308/202089176

Much cheaper the Dynomat and there is also Hushmat but I dont know much about it.

 

Or pull out your old ones and use this on the sheet metal http://www.lizardskin.com/ then put the old ones back. When I get my tractor I plan on doing the doors, floor, firewall etc.

 

Google mass loaded vinyl. That's really all dynamat and hushmat are. They put a foil face on it for thermal reflectivity and a sticky back to help put it in. And they make it more flexible for doing odd shapes in cars. You could buy a roll of MLV and some 3M spray adhesive for much less.