Need to buy or rent or borrow one 70/71 Rallye center cap

I have 17 inch stock steel charger rims for my car and I want to use Rallye center caps but dont know if they'll work as the rims have no screw holes to mount them. I'm hoping to buy, borrow, or rent one cap so I can see if it will work. I have a daily U.P.S. account so shipping is no prob.

Any offers or suggestions will be greatly appreciated.

Sorry, if I posted this in the wrong place. Move it if you need to.

Thanks, Kevin