as far as i know there has only been three releases as Caustic Window.
Joyrex J4 (CAT004), Joyrex J5 (CAT005) and Joyrex J9 (CAT009).
I can't remember which but either J4 or J5 contains a novelty version of
'Popcorn' which although not particularly cool is quite amusing all the same.
hope this is of some use
mark barton