Europa-List: What type of foam used for stabilators?

[Ronald J. Parigoris <rparigor@suffolk.lib.ny.us>]

I need to reintroduce foam in stabilators after repairing the bonding of the 
inner
and
outer bushing. Since I have accelerated parts, have no scrap foam at all.

What type of foam is used for the stabilator in the XS?

I have a sample of Aircraft Spruce Styrofoam small cell, closed cell, 2 pounds
per cubic
foot, not the right stuff too spongy.

I have a sample of Wick supply Polystyrene large cell expanded foam, 1.6 pounds
per cubic
foot, I think this is closer, but still perhaps not as dense or as strong as 
stabilator
but may be OK??

I see Aircraft Spruce sells Polystyrene large cell expanded foam, 2 pounds per
cubic
foot. Think this would be an acceptable foam to use?

Any other source of foam in the states if none of the above is correct?

Thx.
Ron Parigoris