Product relationships

We are looking for a new relation ship manager for our product configurator (or customizer). I want to be able to select certain parts that have relationships with other products when they are selected. In example, widget a is compatible with widget b but not widget c & d. So when widget a is selected only widget b will display because widget c & d are incompatible. (a pop up box may appear notifying the user of these changes when different items are selected that have relationships) I can provide a link to my configurator for review prior to bid if needed. I need a quality code created and will be reviewed before acceptance of the completed project. Thanks for your bids.. & BTW this is a OS Commerce PHP application.