I read about using Pex probably 3 years ago. Bought a piece at HD and made a couple for my 86, really did make a huge difference with how the doors close.
If the Bushings for the Door hinge is worn out, that will also cause the door to sag and put extra wear on the Bushings. Lift up on the door to see how much up and down play there is.
Some of the Striker bolts with the added black steel bracket will unscrew from the bracket and some do not.
I had upgraded the 86 with this added Bracket, so had to cut down one side and pry the Pex open to slide it on.
Iam a frequent flyier at PNP and with a T50 Bit and my handy electric Impact gun have removed quite a few strikers. The one`s that unscrew, and the Bushings look good, I grab them. The Pass door side are usually in good shape, and some Vans or explorers use these on the back doors also. I now have a bucket full of them.
The Bushings are a bit thicker than the Pex.
Here is a picture from Auto Zoo of the Striker.
This one is $16, but seen them much lower
and then good old E-Bay, bless their heart, only $43.70.
OEM NEW Ford Door Lock Striker Bolt, Bushing - Many Applications F-150 F-250 Mustang, LTD, Bronco. 100% Genuine Ford Parts.
www.ebay.com
I think Ford went with the Bracket because people were catching their coats etc... when getting out of the vehicle.
Here is a whole bag for $16.50, hey Christmas is coming up, great Stocking stuffers...
Goat