I have fitted a rev 4 or 5 3SGE in my mk1 with the standard 4-1 manifold but can't find a downpipe that suits this manifold anywhere (have posted a wanted on all the forums I know). Unfortunately I didn't get one with the engine!

What are the other options available to me? Is an exhaust place likely to be able to make a downpipe to suit this manifold or is that going to cause a major ballache and expense as I don't have the matching flange to start from?

Could I swap to a rev 3 4-2 manifold and use a rev 3 downpipe with no problems?

Cheers