Grot Bomb Launcha - Where Are The Rules?
I'm looking for the rules for the Grot Bomm vehicle upgrade and the Grot Bomm Launcha vehicle. So far as I know, it's a 35pt Wartrakk that comes in squadrons of 1-3 in Fast Attack, armed with one Grot Bomm (24"-72" Str8 AP3 Ordnance 1 Large Blast Barrage Twin-Linked) for 35pts, but this is pieced together from what I've managed to find around the internet and from Imperial Armour 8 for the Grot Bomm statline.
I can't find the actual rules for this thing - apparently it appeared only once, in Imperial Armour II - Ork, Eldar and Dark Eldar Vehicles For Warhammer 40,000 by Warwick Kinrade, which is no longer available.
Any idea if the rules are still around and if they are legal?