Re the mudguard flaps, my preference in the second from right for the rear flap. It'll match the current branding, and the name is clearly visible. I would keep it simple, and not try to include a dynamite stick on their too.
For the front, I would say that I don't think the ACME would be legible on the dynamite stick. The flap will be low down and by not using a solid typeface the lettering will be hard to make out, especially when it gets a little bit dirty. If using a dynamite stick, I would aim to stick with a filled in design that would be easier to make out.
Recommendations for mudguards to attach flaps to are welcomed.
I have used the PDW mudguards on 3 bikes, 2 of which have the wider variety that you'd be using. They are of good quality, and get good reviews. The only downside is that they come with sufficiently long mudguard flaps as standard.