M&A / PMI Advisors - Help...?

Anyone out there who has done a moderate to heavy quantity of M&A / post-merger integration work? (For the avoidance of doubt, I'm looking for insight on the consulting, not investment banking side of M&A). 

I'm doing some research on synergy identification and capture in strategic acquisitions, and know that BCG, Deloitte and McKinsey at least do a lot of work in the space. Please PM me - I'll be deeply indebted.