Steve - I applaud you and anyone that wants to replace that rubber around the IC. I have yet to see one..regardless if the mileage of the car is only 1,000miles or 100,000miles where that IC rubber has not split. Might be a good idea to replace the sealing O-rings while you are at it too. I would say get a sharp blade and surgically cut the old one off.
Ole Skool - wouldn't have it any other way