Lots of the SR-71 model kits are rebadged versions of someone else’s kit. Tamiya offered a 1:48 version of the Italeri kit, which I think was from Testors originally. They also offered a 1:72 kit, don’t know if they made that one themselves, or not.
Revell recently released a 1:48 scale kit, it might be the newest one out there. I don’t know how that compares to previous releases, but there are videos out there if you want to check it out.
Lots of errors in some of the kits, here’s one discussion:
https://cs.finescale.com/fsm/modeling_subjects/f/2/t/132437.aspx