Hi Chris
The standard retention process is:
1. Try to differentiate your product based on FAB statements
2. To retain often comes down to price in this day and age so you need to have a 3 step option available according to the market and your mark-ups......e.g. 5%, 10% and 15% discount on the cost according to the profitability of the customer segment or how much you are willing to give up to retain.
3. If no move - you can always offer a free service to review the paperwork so you can objectively offer to compare the offers of the competitor....and then try to go down FAB again once the paperwork/quote comes in.
Standard stuff I think, but hope this helps.