The Energon Pub

[CBratetron]

After getting some Vehicons (yeah, I know, Australia is behind when it comes to getting stuff on shelves)I'm considering a voyager Megatron to lead them. Plenty of RiD Megatron shelfwarmers I could pick up from almost anywhere but I hate the powerizer weapon.
Is there a good alternative cannon for him?

So far I've looked at and ruled out Arms Micron and FE deluxe.
I've seen a shapeways kit that looks promising but it requires assembly and paint.
Has Dr Wu or any other 3rd party come up with a replacement cannon?