What to know when looking for a cutout tail section?

[CanadianAR]

The Swastika tail section cutouts are an item I’ve wanted one of since I got into collecting, but based on import restrictions on guns I focused on them first. As that collection is more advanced now, I have decided to look for one of these. I have read some of the threads here, and have learned to make sure of markings inside, no paint on cut edges or under rivets, etc but where would you learn about the correct rivet spacing and such?
What’s the cost spectrum on these?

I have some preferences and some things I don’t mind.
I definitely want it to be just a square cut style, aluminum with some of the channels on the back.
But I don’t overly care what type of plane, fighter or bomber is just as cool to me.

Thanks for any info!

[robs]

There are lots of fake ones around. Your best bet would be to find one and post it here for opinions first. I was lucky to find a swaz from a BF109 F/G which was wooden.