I'm in the US and have been trying to find a good foam supplier. Could you tell me where you got these quotes from? My teenager is begging me to make her an Ironman (girl??) suit.
If you don't want to try the ebay seller which is posted in this thread, try Wal Mart and JoAnn. If you don't care much about colors, you can try hardware store like Sears or Home Depot
Antifatigue Foam Floor Mat - Black- Best Step-Tools-Garage Organization & Shelving-Garage Flooring
here is an example of 1/4" thick EVA foam.