Niche Cycle and Jets R us both have original Mikuni jets for sale. 

Also have to ask what carb this is?  CT came with VM24 and I think the new (four stroke) flange carbs might be different enough that they don't just bolt on?

4 stroke flange carbs that size will all be honda mounting i think, & offset from a center line. Plus has a fuel screw under the front not an air screw as normal. Be interesting to know how it works if you can mount it. Replaced my honda 185 original with usual worn out needle & metering jet with a chines carb & perfect out of the box. Won't relate very well to two stroke jetting needs though. Do you have a pic of what ya looking at.

Sorry Mark, didn't realize i was talking to you!!. Not sure if what i said is relevant lol.

You weren’t.  I think a bunch of posts got deleted by ksours or whoever it was that asked the question