We have a Sherpa 43i we have converted from a proofer to a poster printer using the Agfaset RIP. We have been using AGFAJET Photograde Satin Piezo paper in a 24, 36, and 42 inch width. However, it is getting more expensive and harder to come by. Is there a substitute media available or is there any way to change the density of the ink in the RIP to reduce the saturation of ink to make it printable on other brands of coated media.