Tasca is as popular as FPG... so maybe.
Local dealer should be able to get them if stock is still available. Show them the FPG site prices... and they might, (maybe), price match... or come close.
Other than that...
Try a google search using "Ford part # 3W4Z-5A649-AA" minus the quotation marks... and start doing some digging.
A bunch of results should show up for Ford dealers all across the country.
One from White Bear Lake MN should show up. Never actually bought from them though.
There was another in Utah, (or Nevada... don't remember now), a few years back that I was buying from... because they offered discount codes... and the price plus shipping was cheaper than FPG or Tasca on in stock parts.
However... they got bought out a few years ago by another dealership.
When in doubt about an "online vendor" (holds true for any internet sales), Google search
"(insert company name here) any good" ... and review results for that business should pop up.