The Reflector and Hardhead heads have never been used but the Ratbat head did eventually surface in the Japanese Generations line. I had one of these on order and cancelled it which I now regret as it's worth £££££
Sideswipe's G2 deco did, as I mentioned, see the light of day in the Botcon 2010 customise class. I coveted one of these for years but it cost ££££. Thankfully the Siege Covert Clone has satisfied my G2 Sideswipe deluxe lust.