I've seen off-brand fuel filters on eBay for $45 or so, right alongside the OEM ones for $79. For something as critical as this, I'm perfectly happy spending the extra money on the OEM filter. Injector pumps are hella expensive.
I'm in a gasser though so wasn't sure. I like running my tank down so feel like I should replace it sooner than later. I have just shy of 69k on the car. Just rough estimate that comes in over 1600 gallons of gas. Seeing as I'm a second owner and they didn't manage 40 mpg lol