Update: currently, the rear OEM muffler is on indefinite backorder. When I checked, there was only a single part at a dealer in the whole US. Online Ford dealers list them as available and will take your $ and then tell you they're on backorder. Several local to me dealers have verified that the original manufacturer that made them for Ford no longer does and that Ford is looking for an alternatve supplier (this started sometime in late Nov). The front “muffler” (that’s what Ford calls it !) resonator is also on backorder but I was told they’re still being made, it just takes time to get one (I was quoted 3wks to a month). Fortunately for me, I kept scouring all the usual online sources (eBay, Facebook Marketplace, etc.) and came across a guy near PHX who had 2 complete sets of pipes for a very reasonable price, both with low mileage although on one someone had cut the resonator out of the front pipe and substituted a cutout. The owner said this put the noise level between the OEM and an aftermarket system and he thought it was pleasant. I bought both and the unmolested set will go on my “stockish” car. I have a line on a front resonator in great shape that I’m trying to buy to restore the second system to complete stock. So, as was suggested by isis, if you want a quieter exhaust and look long enough, there are some used ones out there to be had. Or you can wait for Ford to catch up with demand; that will run you around $500 - 600 with discounts for both pipes but be sure to check shipping costs along with the parts pricing.