Excel Plug-In for Bulk SMS Service

We are into bulk sms service, we are looking for SMS excel plug-in software for my our customers, i am using 4 sms service providers api, i would like to integrate all these 4 sms service providers Api with Excel Plug-in. I would like to have the following features in the software: 1. Supports MS Excel 2003, 2007 and 2010 2. Easy Menu and Tool bar and context menu item. 3. Customers should able to send static messages or personalized messages (include column data in the message) 4. Customers should able to choose random numbers using Ctrl key or Shift key to send messages.(right click option) 6. Supports Delivery Reports 7. Create templates. 8. Fast and accurate