If you mean the pipes from the pump to the carbs then you can use any plastic or rubber type oil piping. I went for the clear type.
I often use my local bike spares shop http://www.ridersmotorcycles.co.uk/Scripts/default.asp.
The chap that runs it used to import NEW Jap bikes and has a wide knowledge of most things Jap 2 stroke.

Hope this helps.

Mike
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I don't mind dying...I just don't want to be there when it happens!