There is a TrackMaster 2 wagon that is a decent match for a salt van, it's one of the only TrackMaster 2 wagons that I don't immediately chuck in the parts bin. Pity it isn't a bit taller.
There's also a nicer painted and slightly better proportioned one from classic TrackMaster that was in a few things, I have a green one with a black roof from a quarry cars truck pack, but it was available with a few different engines and other truck packs
The old Henry box car is supposed to be a salt van as well I believe, however the roof is not nearly as pitched and having originally been a much older Plarail mold it doesn't have the details any of the others do. It was still being used by Mattel basically unchanged up to the end of classic Trackmaster in various colors.
I'm sure there are a number of OO/HO salt vans you could convert to Plarail easily as well
There's also a nicer painted and slightly better proportioned one from classic TrackMaster that was in a few things, I have a green one with a black roof from a quarry cars truck pack, but it was available with a few different engines and other truck packs
The old Henry box car is supposed to be a salt van as well I believe, however the roof is not nearly as pitched and having originally been a much older Plarail mold it doesn't have the details any of the others do. It was still being used by Mattel basically unchanged up to the end of classic Trackmaster in various colors.
I'm sure there are a number of OO/HO salt vans you could convert to Plarail easily as well
I have a website where I have been writing about and photographing many of the sets and pieces that I find interesting.