If you have saved a custom preset, they are saved as plist files in your Preferences folder. For example, let's say your printer is named Home Printer. Look in /Users/<your_account_name>/Library/Preferences. There will be a file named com.apple.print.custompresets.forprinter.Home_Printer.plist (obviously, the name will match your actual printer name as this is an example). Copy the plist from the old machine to the new machine and place it in the same place.
If you are not referring to custom presets, then perhaps you mean that you are missing the driver which delivers a PPD. If this is what you are looking for, then go to the vendor's web site and download the latest driver installer for your printer. This will provide all the printing support needed. Note, for most modern printers that are AirPrint compatible, you should not need a driver pack.
Hope this is what you are looking for.