Exhausting question

I was thinking about changing the exhaust on the track bike and have hit dead ends everywhere..
Are there any options out there for a J1 ZX6R exhaust in terms of a lighter full system?
I've looked at most of the aftermarket places, ebay, gumtree and anywhere else I can think of, but haven't found any, to even get an idea of what kind of wallet damage I need to account for.
I haven't looked at getting a set custom made because that would be beyond my budget for sure, but would be happy with a slightly scuffed used system, if that's all that's around.
I've been lurking here for a while and having had no luck with the internet for this question thought to put it out to the group to see what comes back.
Any advice would be appreciated, as usual.
Are there any options out there for a J1 ZX6R exhaust in terms of a lighter full system?
I've looked at most of the aftermarket places, ebay, gumtree and anywhere else I can think of, but haven't found any, to even get an idea of what kind of wallet damage I need to account for.
I haven't looked at getting a set custom made because that would be beyond my budget for sure, but would be happy with a slightly scuffed used system, if that's all that's around.
I've been lurking here for a while and having had no luck with the internet for this question thought to put it out to the group to see what comes back.
Any advice would be appreciated, as usual.