Can you supply this part?

A home owner from Sydney, Australia says:
Hi, this is a bottom boot out of a double hung aluminium window. I have included some scale drawings in millimetres and inches too. The spiral balance hooks in behind the two small triangular extrusions which have broken off on most of the windows so the balances can't be tensioned.

User submitted photos of a window balance shoe.
User submitted diagrams of window balance parts.
Profile picture of Paul
Paul from SWISCO responded:
Thank you for posting, Steve. I'm afraid we do not have a match for this shoe, but you may be able to substitute with our 15-017 . Check it out and see what you think.
A home owner from Sydney, Australia says:
Hi Paul, Thanks. I will order a couple of those and see if they suit.
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