NH Detail have announced two new photoetched upgrade sets for April:

NH Detail A144-015 Boeing 720 Detail Set for Roden (314, 315, 317, 318, 320)
NH Detail A72-023 Yakovlev Yak-28PP Interior Set for AModel (72108-01)

NH Detail sets are available now though a number of outlets, including their official distributor NiraHobby.

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