The hubs are from a Chevrolet Citation,Circa 1980. Take a look on the inside of the wheel for a stamp that says GM and/or a number. The Citation was front drive so you may find that it has a bit of positive offset. Check the junkyard. if they no longer have a Citation they can cross reference the wheel to something that will fit.
For a spare maybe check for a minispare rim It is probably wide enough to accept a small trailer tire.
If it is a 13X4.5 the 4.5 is likely the width which is common for minispare wheels
I don't recall what came on the Citation 35 years ago but it could be that narrow for the street tire.
car dolly from the same era also had sealed bearings with a positive offset wheel I don't recall the size offhand so who knows? maybe the same parts?