67 step side wheel question

[Hot Rod Opie]

Hey guys. I posted this pic of my wheels on a different thread to identify them. Now that I know what they are I have another question. These wheels have the screw on style center caps. Of course when I tried to take them off the screws broke off in the wheel. So my question is can I use regular center caps that go in from the back of the wheel or am I going to have to try to drill the screws out. Any answers or suggestions would be appreciated. Thanks!