If you will go to the Technical Resource Library (TRL), you will find good information on how to repair, (in this case, replace) those power window switches. There are step-by-step procedures on how to get those switches out to clean and repair them. You should be able to replace those old ones with the new ones. Or, you might be able to repair the old switches and save the new set as back up. The link to the TRL is right below my signature element. Look in the Windows Section of the TRL. If you do not see it, this is the link you are looking for.
Your post on this subject should have been made in the 1958-1960 Squarebirds Forum, not this one. So if you need further assistance, please post there instead of here. Thank you.