Need help with '74 Space Duster seatbelts

I have the front and rear retractors but I do not have the buckles. I am looking for all four, don't care about the rear middle (if there was one).

I have replaced the front bench with custom buckets from Jegs so I need short buckles so the 3-point factory harness works correctly.

They don't have to be OEM as long as they latch properly!

Any ideas? All I found so far are these and not sure they are correct:

1966-74 A B E-Body Oe Rear Lap Belt In Black