Windows XP Computer with CADDIE 9 and dongle

Looking for a computer with Windows XP with CADDIE 9 software with accompanying dongle to buy. Need not be new, but in good working condition. Can be just a tower. If possible an older laptop with said CADDIE 9 software and dongle. I work at a large hardware store and building material dealer, I will also be responsible for new layouts in the store regarding the showroom and display areas and would prefer to have a computer and software to do design said layouts, but do not want to buy a new computer and new software as it will be too expensive to buy and time consuming to learn the new program which will be used only for interior layouts.