Hi all, i'm new to the forum. I am nearing the end of a campervan conversion using a 2013 Transit Jumbo XLWB panel van. I am about to cut the exterior hole for the cassette toilet but the shape of the transit means the access door frame will not sit flush to the side of the van. I have seen in magazines where others have used a moulded infill for the gap left but I can't track one down. I emailed Thetford who replied that they know what it is but that they don't manufacture them. Does anyone know what they are called or where I may buy one? Any help will be much appreciated. Thanks.