David I don't have any drawings, but I can say that my tank on my 01' is headed in that same direction. That said I have also read it is wise to replace the radiator hoses, might as well while you are at it. Just a thought since you may need to bleed the air out of the system anyway.
www.pelicanparts.com has the tank as does
www.bmaparts.com princing is about the same, but BavAuto may workout better shipping wise.