There is still the plastic one outside Alconbury. It lost a sidewinder some time back. It was made by a Company in Huntingdon called Specialised Mouldings. Now called Paxfords. They also made a few spits for gate guardians and Hawks for
PR, a Tonka for the 78 Farnborough show and a Jaguar especially for Nutty!(I think it is Nutty or Leon who keeps on about Jaguars!) they still had some of the moulds when I worked there for a few months in 99 on the Harrier Sim.
The F5 was made when they were slack in between the motor racing seasons. the plan was to put heaters in them to provide an IR signature and tow them around the airfield as decoys. they only made the one as the cold war was drawing to a close.
I certainly remember the F5s flying around with the bloody noisy RF4Cs in the 70's and early 80's