Kitchen and bathroom window channel balances

I am looking to purchase two pairs of channel balances, one set for my bathroom which are 17" in length and 1/2" width with code stamp 1610Z not shown in images but with exact same hardware as shown. And then another pair for my kitchen window that are 23" in length and 1/2" width with a code stamp 2230B with the B being backwards as seen in the image.  Could you please let me know if you have the parts I need to replace these, I followed your videos instructions to get measurements so info should all be correct. Thank you