Write some Software

I need a script on my website like the one on [login to view URL] I want customers to be able to choose their vehicle's make, model and year, (3 drop down dynamic menu's) and the script to narrow down the right tire sizes based on 3 attributes (thread, diameter and ratio) and display matching results from the database. For example, if they choose BMW the second drop down menu next to it has to already have narrowed it down to only bmw models. By 3 attribute, I mean the actual products in the database will have 3 unique attributes, (thread, diameter and ratio) and once the vehicle is selected, lets say a BMW 328i uses 255 / 60 / 18 tires, the script will find all tires that match all 3 criteria. I need someone who can write the script and put it on my website, and be able to link it to a shopping card (whichever one he preffers and will work with bluehost) and set up a database, so that all i need to do is make changes to the database.