Complex Data Harvest and Reallocation

I have a probably several step job that I need done ASAP. In January a designer moved my site from J!1.5 and vB3.8 to J!2.5 and Kunena 2. There have been too many problems to count and the designer has since dropped contact. We have removed Joomla by building an entirely custom site, and renewed our vB license. We have a back up of the original vB database, and can duplicate our live db at any point. What we are seeking is someone to mine all new data from the current database, for a date range, then compile it and combine it with the old, non-corrupt vB db. The ex-designer has corrupted much in the new K2.0 db, so we are not looking for a complete transfer, only a mining of the data since the release of the new system until present. Please do not bid with messages to check my PM. I will remove those bids and ignore them. I want people who will explain to me how they plan to approach this problem and references from previous clients, in English or French only. Feel free to also PM me, but messages that say only "Plz check pms" will be deleted and ignored.