You can get a generic set from Pep Boys, etc. It has 3 different diameters and comes in blue, red or yellow. Issues I had were with the smaller molded hoses-can't replace those with generic silicone. They kink. Clamps are all a different size, so all new clamps are required. I bought an assortment of clamps at the same time I bought the lines. These hoses are for vacuum only, and not for hot water or fuel.
If you can find a set specifically for the Mark, including molded hoses, that would be cool.