I have a limited new batch.
15/16 OD with 1/2 ID. $20/ft
1 1/8 with 5/8 ID. $30/FT
1.3"with 5/8 ID. $40/FT
Best you can find now.
Joint size works great for piloted .550 brass inserts. Just bore.
Bottom cap size works great for extension kits with a little more than 5/8 screw insert.