There were two PCMs used on our cars: SBEC (single board engine controller) - used thru 2001, and NGC (next generation controller) - used starting with 2002.
The hole (tone) pattern is different on the cam tone wheel and the flywheel (AKA flex wheel) between the SBEC and the NGC systems.
The fine-pitch chain system was not used on our cars. It was used in the later LX platform. Chrysler came out with chain kits to combine the SBEC tone wheel with the fine-pitch cam sprocket, which allowed pre-'02 (SBEC) LH owners to upgrade to the new chain design. I don't know if there were other platform 2.7s that actually came from the factory with the odd-duck SBEC/fine-pitch chain combination, or if the kit was strictly to accommodate the earlier year LH for converting to fine-pitch chain. Whichever the case, the particular Chrysler parts guy I dealt with when I did my chain/waterpump/etc. replacement knew of the permutations and of the kit I needed to go to the fine-pitch chain.
If there was a particular platform that came from the factory with the odd-duck transitional version of the timing kit, perhaps they did, and maybe still do, sell just the SBEC/fine-pitch cam sprocket by itself. But if the odd-duck kit was created just as a convenience to '98-thru-'01 2.7 LH owners, there is less of a chance that they ever did or still sell that sprocket. Hopefully it's documented in the Chrysler parts system in a way that is easily discoverable and you can get that information from a knowledgeable and patient parts guy.
Other than that, without part numbers, discovering by search words (like on eBay) may be difficult. You do have "SBEC" as part of the search for the right tone pattern, but I don't know that there are words for the pitch part of the equation. You can go by the number of teeth if the pictures used are accurate - doubtful the mention tooth count in the descriptions.
Easy solution would be if you discover that there is the odd-duck sprocket separately available (once you have the part number, eBay - Chrysler dealer seller if actual availability thru local dealer is difficult). But again, if the information is difficult to obtain, it may be worth considering swapping tone rings between your sprockets. If the rivet hole patterns are the same, it might be the best way to go. Either use strong rivets or bolts (if space for bolt head and nut) that allow close to zero play in the holes for alignment accuracy. Use thread locker if you use bolts and nuts.
'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs