Custom Magento module needs minor fix

We recently had a custom module created for Magento. It is built as part of the 'custom options', and is a database of motorcycle makes and models. But it is not working as it should, and the freelancer who built it will not get back to me to fix their bug!!! There are 2 drop downs, the 'model' and the 'year'. The model list is meant to be populated based on if the product is available for that model. The year list is then meant to be populated when the user has selected their model. But it just displays all the years for all the models! We urgently need this corrected. Please bid, and include your experience with Magento, and custom Magento modules. Please see the link below to the product page, so you can see how it is currently working: [login to view URL] Thanks