I don't have any, but a friend does. He said $125 per side would be fine, inner and an outer. As long as it's a Dana 44. Dana 50 he may not have all the bits.
TTB means twin traction beam, as in two beams that swivel in the middle, versus a single solid axle that doesn't move in the middle.
You could have a Dana 44 or a Dana 50 up front, Dana 44 had small locking hubs versus the large Dana 50/Dana 60 locking hubs.