very very hard to find these in good nick mate - the black chrome OEM finish was only good for a few years at best before it started to go *off*.....and I haven't seen a good set of black chrome pipes for many a year now.....
not sure if you can get the black chrome finish replicated anywhere ? If you could, then a set of headers from any of the 1100 motors will do the job.
best bet would be looking to the US to find some of these - US ebay motors is a good start.