Patching lost database to magento store

I lost data from March 15 to May 20 all orders, products added etc are gone. I found a backup copy of my store dated April 27 which should contain everything between March 15 to April 27th I need a highly skilled expert to only patch missing "Orders and Products" to my store "without losing current data" so at least I can get some of the data back. No other data is needed. Just reinserting Orders and products that are missing. My hosting company told me restoring the store with that data would mean I would lose everything from April 27 to today so I need someone to keep all current data, and only patch the missing data from march 15 to april 27.