I have just finished reproducing the 1969 - 1970 C9AZ-7347-A lower steering column tube bearing. I reverse-engineered this part from an original bearing and had it produced using the same natural nylon 6/6 material as the original. Price is $20/each plus shipping. It can be purchased directly from my web site:
https://www.musclecarresearch.com/C9AZ-7347-A