if you do use another flange as a space, you're going to need another gasket to put between the two flanges and one between the last flange and the block, right?
Don't forget longer studs if you use an extra flange. NAPA auto parts usually has a decent selection of both standard and metric studs, they won't know them by application, but if you take yours with you and jsut dig and compare from their bis you should find what you need. Good luck