Hot Rods 41' Willys Locking door handles needed

I purchased a Rolling 41' Willys (Glass) project with a crate engine (350), TH350 trans
& an S10, Rear-end.
I installed a mild cam, 700R4 and a Ford 9" Rear-end, with/3:50 gears. Not a bad car but...
I hate the door-poppers (That were already installed) & would like to replace them with locking door handles. Someone at a car cruise mentioned installing 40' Ford door handles, any advice appreciated.

 

40 Fords did not have locking door handles.

 

Willys Replacement Parts. willysreplacementparts.com