Nothing exhaustive, but did a little looking around to see if I could figure out some 5x4.5 rotors. Started with the parking brake shoe and they appear to be used on a fair number of rigs, unfortunately they are either Chevy's, more Rams or a Ford trucks. This leaves zero options for a 5x4.5 bolt pattern.
There is the possibility that the width and diameter of the shoe is the same as other options, but there wasn't any data to use. So kind of dead ended there.
Best I can tell, those disk brakes won't be useful to you.
