Recover & Republish Inactive Sites

I have between one and five client websites that were taken offline after invoices went unpaid. I still hold full access to each original hosting account and the domains remain under our reseller umbrella, but there are no usable backups on record... (Budget: $10 - $30 CAD, Jobs: MySQL, PHP, Web Development, Web Hosting, Web Security, Website Design, Website Management, Website Optimization)