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P&A Plastics Inc - Hamilton (MSXVII mentioned them)
https://paplastics.com/motorcycle-windshields/windshields/products.html
Located in Hamilton so it’s closeby
They make custom windshields for boats and motorcycles
Will call/email them to learn more about their requirements/rates/ability
2. Polymershapes - London
https://www.polymershapes.com/locations/london-ontario/
Their pretty big, have locations world wide
Will call/email for consult