Not entirely extinct... An H6K4 lies on the seabed off Bougainville! When Charles Darby published his great book 'Pacific Aircraft Wrecks... And Where To Find Them' in 1979, she still had all her instruments, including her search radar.
I've just completed a 1/72 Smer Dewoitine D.520, and I'm pretty thrilled with how well this one came out. I'll add more of my older builds at a later date.