I am trying to replace broken channel balances in some commercial windows. They are 1/2" channels measuring 23" long with 2230 stamped on them. The top acorn I matched and is your part #
19-009. The bottom shoe I was not able to match from your selection. I have enclosed 3 attachments, two photos of the part and one of dimensions. Let me know if you have these and weather you can make some of these replacement channels. Thanks