I am building a 1:500 scale model of the USS North Carolina BB55 which for some reason didn't come with the Kingfishers or catapults. It came with a helicopter (which it did have after WWII) but I wanted it to be in WWII configuration. I found Distefan and the 1:500 Kingfisher and catapults. I have not received the cats yet.
The Kingfishers are tiny BUT the detail is great. I still haven't painted them but they are going to look great on my model. One thing to note is Distefan ships them with the 3D printing excess (not sure what it is called in the 3D printing world) so you have to carefully cut it off. I think this is a good way to ship because it stabilizes the actual model keeping it from breaking. Just be very careful cutting it off as the plastic used seemed a little brittle compared to the normal plastic model material. Distefan also says to use super glue not plastic modeling glue like Testors to attach. I'm not there yet though but will heed their instructions.
If your in the need for a 1:500 scale of a Kingfisher or a USN catapult Distefan is the place for you.