From this shortlist, i would like:Short-list
Curtiss-Wright 35 Hawk
Grumman F4 Wildcat
Hispano-Suiza 12Y, in-line, water-cooled, hp
Wright R-1820, 9 cylinder, single-row, Air-cooled, radial, 1,000 hp.
Berezin and DShKM 12.7 x 108 mm, MV 2,600 FPS, 1,000 rpm
Browning .50 calbre HMG (12.7 x 99 mm NATO), MV 2,900 FPS, 1,200 rpm
MG FF 20 x 80 mm, shell weight ? , muzzle energy, MV 2,00” FPS (600 mps), 500 rpm
Hispano-Suiza 404 & Oerlikon 20 x 110 mm, mv 2,700 fps, 450 rpm
ShVAK 20 x 99 mm, mv 2,500 FPS, 750 rpm
Airframe: Curtiss Hawk
Engine: Wright R-1820 1000 hp
Machine gun: Browning M2 12.7mm
Cannon: Hispano-Suiza 404
From shortlist, most performing airframes may be Dewoitine 520 and Kawanishi Ki-43, but these are absolutely unlikely to be purchased/built in 1938.
It would also be fine to have some second-hand Swedish FF.49 for coastal patrol. These are cheap to purchase and operate in peacetime.