VA WTB : Seat Belt Extenders

[*71SWB*]

I'm having my bench seat removed and factory bucket seat belts installed. I bought the seat belts for bucket seats and when installed they are 4"-6" to short. I am referring to the seat belt that has the plastic sleeve that goes between the console and seat. I'm hoping someone sells an extender that can be secured to the floor and then the other end to the seat belt. I have found some that are made of seat belt material but they would prevent the seat belt from being stationary. I'm hoping some has some made one out of steal. Can anyone help??

Truck is 71 SWB 2WD