I believe the part number for that U-clip is still recognized. It was used on cars right into the 2000s. I bought a pack of a hundred of them about a year back when I was working on a truck at the museum, but I'll quickly research and see if i can find the source.
Found it. Part number is 91a-2106. Prices vary with some dealers wanting $15 just for one. Here is a pack of 30 on ebay, but there will be lots of other sources:
https://www.ebay.ca/itm/357450952585
If you look at the list of applications on the link I sent, it lists the various applications. In the interest of posterity, since the link will eventually disappear, here are the applications:
1980-1983 Ford Fairmont
1980 Ford Granada
1986-2007 Ford Taurus
1980-1997 Ford Thunderbird
1980-1983 Lincoln Mark VI
1980-1997 Mercury Cougar
1980-1991 Mercury Grand Marquis
1983-1986 Mercury Marquis
1986-2005 Mercury Sable
1980-1983 Mercury Zephy
Also: 1939-96 Ford Truck, 1966-96 Ford Bronco, 1939-96 Ford Car
Any Ford dealer will recognize that part number, but it may be cheaper to buy a complete hold down kit for a taurus from an aftermarket jobber. Depends if Ford's price of $12 is for one or a pack of many.