Until now if you wanted to convert the Luna Pawn AFS into a Luna Rally Pawn AFS, you'd have to have scratched the helmet yourself, buy a WF conversion kit or order PINK TANK'S conversion kit from HLJ.
It's great that Wave may produce this because we'll probably see a new camo card and decal sheet as well as "cute" new pilot as Kow indicated in his FB post. You'll likely be able to build from the same kit either variant because the helmet/top of engine cover is the difference between the two.
(See photo below from Maschinen Krieger Graphix Vol. 3, Kow's build- Luna Rally Pawn leading with Luna Pawn trailing)
PINK TANKS Luna Rally Pawn conversion kit available on HLJ- HERE
The original AFS Luna Pawn (below) is the kit PINK TANK's Luna Rally Pawn conversion kit works with. If you own this kit, you could easilyake the conversion. This is kit is no longer available though. Don't pay $80 on eBay because the kit from Wave should retail under $25usd. As I mentioned, you'll most likely have the choice to build a Luna Pawn or Luna Rally Pawn from one kit.