Well it seems that BASF have come out with a dream product for modelers - mutli crash resistant, tough, elastic, solvent tolerant foam. Seems almost perfect for building foamies.

http://www.basf.com/group/pressrelease/P-10-295

the question is where to buy? Any ideas?

seems no one noticed this query.

no clues , but there are many materials which are close to crash resistance , like epp