I don't know what brand of entry door locks you have but I suspect they are the disc type lock and most of them are pretty easy to restore to new. Look up the maker for the best information.
I just keyed and installed a new ignition lock on my F150. Pretty simple and after all was said and done, I could have just cleaned and lubed my existing lock. I did find out that the keys cut was not matched to the lock but the cylinder was so gunked up almost any Ford key would have worked.
My point being, they are really easier to repair and rekey than pin tumbler cores. Simple kits sold on Ebay and instruction can probably be found on Youtube.
Or just buy new with proper keys or have the new rekeyed. Let us know what the name if the maker is and I'll look it up in my catalogs.