Since the IMS Solution lists for $1,849, $3,300 doesn't seem outrageous but it is a lot of money. I have no DIY experience, but if you end up doing it yourself, here are a couple things I learned from my shop when mine was done.
The flexible oil line from the spin on filter adaptor to the IMS end plate cover was overly long so they had it shortened.
The fitting that came with the kit to screw into the IMS end plate cover had a large hex flange to put a wrench on it. If they used that piece, they would have had to notch the flange of the engine case half all the way to the seam where the case halves meet. They used another piece of threaded tube which enabled them to keep some meat on the case flange near the seam. You can see a gray piece in the picture below:
