74 Duster wheel and rim sizes.

I would talk to them in the morning, 160 restocking fee is steep.
I sold wheels, new tires and lugs off my duster for $150

Also keep in mind even repo mopar wheels have the incorrect back space, most only have 4".
You can special order the correct back spacing / same style wheel from center line but expect to wait 6 months.

4.25" makes ever thing fit on a duster.
I reconditioned factory ones, keep in mind they came on everything trucks, cars.
The date code on mine are from 1985 so they came off a diplomat.