Balance rods
Hello! Based on your photos, I recommend our S380-29 channel balance. This comes with a 19-005 top and 15-005 bottom fitting, which I believe will match yours. The style of your fittings is slightly different but that should be okay. I'm more worried about dimensions. As long as the size of our 19-005 and 15-005 match then you should be okay.
I also recommend a 2840 stamp option, when youre prompted for it. This matches your old stamp of 28D.
Finally, concerning bulk pricing, you can see a detailed price per quantity breakdown on the S380-29 store page.
Please let me know if you had any questions. I'm happy to help as best as I can.