Atomik Modeller

Hi all, I've spent far too much time looking for photos of the underside of P-61 engine nacelles trying to figure something out. I'm doing the old Monogram P-61 and there's what appears to be some sort of grille just aft of the main cowling. The kit looks pretty crude but I can't find any photos of what this area actually looks like. Does anyone have photographs of this area they could share please?

Just measured the wheel diameter, the sizes are quite different. Should have done this first... 🙄

I'm looking at the old Monogram P-61 and as a product of its age the wheels aren't that well detailed. But I'm thinking they look a lot like the wheels on the A-26 Invader. Did aircraft manufacturers manufacture their own wheels or were these an "off the shelf" item they selected to suit the calculated loads etc? I have a spare set of wheels from an A-26 and thinking they'd be a big improvement over the P-61 wheels.