try Ryco at
http://www.rycofilters.com.au/catalo...model/wrangler
the TJ takes a Z89 which is a shortened version of the ubiquitous Z9 thats sold by the millions and therefore as cheap as chips. its what I use as there is enough room to fit it in. except for the length everything is identical, like beta ratio, bypass, etec etc
the above link gives ryco air and oil filters for he JK v6. the oil fiter nominated being a z418.
dont know how common the z418 is, but like the TJ there may be a longer/shorter version thats otherwise identical and a lot more common and is suitable. it just requires someone to do some research. otherwise probably find the z418 is sold at supercheap
ryco are about the most common auto filter sold in this country, but the sticky doesnt mention 'em?