there is a faasv kit out there, I've seen a few in the shops here where I'm stationed but they disappear fast!!!!!!!!!
I've been trying to get my paws on some as well.
548's are fun to drive, I had fun at FT Drum the last time I drove one , those sand dunes there make it interesting.
but as far as the faasv/cat I'll let you know what I find out the next time I hit the Marktplatz.