What do I have to pay for fancy hubcaps?
Any where from junk yard prices to why would you spend that much . Your vehicle has alloy wheels , do you really want to buy steel wheels and hubcaps .
If you REALLY want to change out your alloy rims for steel, you will need to google the rim size and see if anyone actually sells plastic wheel covers in that size. Then you will have to do the same to see if there are steel rims available in the correct size.
Even if successful, I would bet the rims/wheel covers/mounting of the tires is going to cost you some relative big bucks.