custom smf mod

looking for a mod to fit in with existing website using smf, The mod will be an shop type mod in which users can sell there own audio files they have made mod will need following features seller uploads file they wish to sell sets price name and description and so on buyer can preview the music if possible buyer pays for file threw paypal directly to seller minus a commishion which is paid to my paypal once both payments are made the buyer has access to download the file Payment will be made upon completion of mod and i have fully tested cheaper the better! more info via pm