Any Kona dealer should be able to contact the company and get more sent out. If you do not have a Kona dealer in your area then try sending an email to their general information guy at:
If you get no response try their warranty department in your general area.
They may have some late model UTE bags they can sell you. Kona is a relatively small company run by good people, it shouldn't be too hard to get a hold of new bags directly from them.