I have neither a Fostex nor a 32Gb CF card...
BUT!
I've done some reading recently into this sort of thing and I found that both devices I looked at actually accepted a bigger card than was officially supported.
That's a Microtrack II which I think officially says 8Gb CF but folk on here have used 32Gb, I'm using 16Gb; and the Nokia 5610 officially supports 4Gb SD card, but photographic proof was posted online of it recognising a 16Gb card.
What's the official max? If it's 8/16Gb I'd bet it'd work... but don't take my word for it, wait for some proof before throwing your money on that smoking bonfire!