[oldopelguy]

Mine was actually in a Kadett, with quite a bit of metal work involved. A Kadett lower hose should work fine, though, on a Manta.

Often times you can fit everything together, figure out what sizes you need the ends to be, and mock up something in the general shape. I've used all sorts of things, from pool hose to bicycle inner tubes filled with expanding foam to make myself a model of what you need. Then, model in hand, head to your parts store and ask them to look at what they've got for hoses. It'll be pretty obvious what won't work, and scrounge around a bit to see if you can find something right, or close enough to right you can cut a bit off and use it. I've never failed to come home with something that'll work this way.