fine tuning Osc site

Looking for a programmer who is experienced with OsCommerce who can help to fine-tune the site and install new contributions. The site has many custom contributions already installed, therefore conflicts are likely and need to be avoided. Ideally we need someone who will be available on a long-term basis for future projects and available on short notice. Initial projects include: customizing CCGV contribution, improving site navigation with minor design changes, html emails (order status and confirmation).