Aires has released several resin upgrade sets in 1/48 and 1/72 scales

1/48 Scale
4712 - Ki-61 Id cockpit set – Tamiya kit
4714 - Ki-61 Id engine set – Tamiya kit
4716 - Ki-61 Id control surfaces – Tamiya kit
4721 - Gloster Gladiator seat – Roden/Eduard
4723 - A-37A Dragonfly cockpit set – Monogram
4724 - P-40B wheel bay – Airfix
4726 - SAAB J-29 Tunnan wheel bay – Pilot Replicast

1/72 Scale
7351 - Spitfire Mk.IX control surfaces (metal) – Eduard

Please remember, when contacting retailers or manufacturers, to mention that you saw their products highlighted here – on AEROSCALE