[autoavia]

Doyousha made a 1/25 scale plastic kit of the Pink Panther car which was  last available for a while in the 80's but hard to find now. It may have been a reissue of the kit originally made by Eldon in the 60's.

https://www.scalemates.com/kits/doyusha-...er--631958


Dinky Toys made a Pink Panther car which had a plastic body. The first release had a flywheel powered by pulling on a toothed belt and the later version had the back closed in to cover the space that previously held the flywheel drive. The second version would be better for conversion to a slot car.

https://mikepigottsdiecasttoysandmodels....-by-dinky/

At one time battered ones were almost two a penny at collectors fairs but I think they are a bit harder to find now. No idea what scale it was meant to be but at around 6 ins long it is quite close in size to a 1960's MASCAR in 1/32. The review in the link above does say it was short and stubby when compared to the real car but it might be possible to cannibalise two models to make it longer. The plastic body would make it more viable for a slot car conversion than any diecast.

AMT/Ertl produced a 1/24 or 1/25 scale plastic kit of the Ghostbusters Ecto1 and there were also some plastic toys with electronic sounds but I think they were large scale (about 12 ins long).