joomla module adapted for use on ordinary website

last year i had a joomla module developed for my taxi site that calculates taxi fares. the people who did it did a crap job to be honest as there is no form field validation and the code seems bloated and very messy, basicly they took advantage of my ignorance and did the very bare minimum to get my money. well now i want to move away from joomla to a basic html site so i want the module to be able to work as stand alone away from joomla and i also want some form validation written in, the code tidied up and a proper confirmation message to the user when the form is submitted. thanks in advance