You can get a Hex Dragonfly off of Amazon and many other distributors right now. However, and I have not looked, I can see the AOS plate you need to mount one being a problem to get, where everyone they make for the new platform is being packaged with the 4.25" version.
If you really want the 5" I would say just get the thing, shoot it, and wait however many months it takes to get the plate to add the optic, although you could also just wait and see the price for the entire package go down, something that has happened with the Hellcat Pro now that it has been out a while and has me considering adding one to my collection, although I do like the P365X Macro, but that has the problem of being new and the magazines are not available but it at least uses the same optics mounts as the rest of the P365X/XL line.
If you really want the 5" I would say just get the thing, shoot it, and wait however many months it takes to get the plate to add the optic, although you could also just wait and see the price for the entire package go down, something that has happened with the Hellcat Pro now that it has been out a while and has me considering adding one to my collection, although I do like the P365X Macro, but that has the problem of being new and the magazines are not available but it at least uses the same optics mounts as the rest of the P365X/XL line.