This is based on a line drawing of the Skyguardian Radar which was published during the BAe Nimrod AEW.3 development.
I selected a 'spares or repair ' 1/72 Heller C-160 which the rear loading ramps and one of the four propellers was broken.
Using a bit of whiffery I have added the resin radomes from the MasterCaster BAe Nimrod AEW.3. The rear radome had been cut down before and I have used the rear door of the Italeri Fairchild C-119, plastic card, the Rolls-Royce Nene engines from the Combat Model Avro Lancastrian conversion set plus a pair of 3D printed nozzles.
Second one from the bottom, looks like a C-160.
(https://i.imgur.com/zhkcf9O.jpeg)
Just waiting for the Milliput filler to dry.
(https://i.imgur.com/H4znU3a.jpeg)
What if the Swedish boffins managed to get the radar to work, some kind of test aircraft would have been needed and the turbofan engines don't look too out of place.