You can find affordable wheel center caps on hubcaps-wheelcovers.com.
Chevy center caps are basically hub caps. They go in the center of the wheel, giving the wheels a nicer look. The caps usually contain the Chevy symbol and/or name. The caps also protect the centers from dust and debris.
Try using the lug wrench. If its an older model with the wire-wheel caps, you'll need an adapter tool to unscrew the caps from the center after you've removed the center cap.
If they are regular hubcaps, carefully pry them off with a screwdriver or other similar tool. If they are wire wheel caps, you will need the special tool to unscrew them from the center hub.
Dallas Auto Wheel Covers & Hubcaps is an excellent shop located in the area
Try using the lug wrench. If the car has wire wheel caps, you will need an adapter tool to pry off the center caps and unscrew the cap from the wheel
Pueblo craigslist/autoparts.
Use the lug wrench. If the car has wire wheel caps, you may have to use the adapter tool to remove the center cap and unscrew the cap from the hub.
start from the center and work your way to the ends. torque the caps in 3 stages such as: 30, 50, 70.
Search this site, they have books and video's: [Link moved] However, "Threaded Hubcaps" by Dennis Kuhn Snr of Buckley, MI may assist in identifying threaded or screw on hubcaps. Some assistance also from hubcapcollector.com which was established to help collectors of mainly pre-1930 caps
Cheap center caps can be found at www.Hubcaps.com .
Try upstreamcentercaps.com if you want custom center caps. Otherwise you can find OEM center caps on ebay for a good price.