Fuel filter is in the gas tank
You're the first person I've ever heard complain that Webtech isn't comprehensive enough but quite honestly, I don't think you'll find anything better that won't charge you an arm and a leg. The fact that Hyundai offers this to its clients (free of charge no less) is nothing short of amazing and I think it's a great gesture. If you do find anything, please be sure to let us know.
Owners manual says to replace the fuel filter 52.5K miles or 42 months. HMA service looks like they messed up the repair manual again, which is normal, so there is no diagram.
There are Chilton manuals available for the Santa Fe but the consumer version of Webtech is watered down from the actual site used by dealers and their technicians.