Those brackets are made by Rollease. It looks like one of the R series brackets. They make mounting systems but not the shade itself. This is from their FAQ page:
Where can I buy Rollease Acmeda Shades?
Rollease Acmeda doesn’t make complete window shades; we make and distribute window shade component parts which are purchased by companies that make shades. You are likely contacting Rollease Acmeda because you saw our name on one of the parts in your shade (the clutch). If you wish to purchase a new shade, please contact a window covering retailer in your area.
Who do I contact if I need my shade repaired?
Please contact the dealer who made your shade.
I'm not the original homeowner and I don't know who made my shade. Who should I contact in this case?
Refer to your local phone or internet directory using keywords "window shade replacement", "window shade repair" or "window shade installation."
https://www.rolleaseacmeda.com/us/frequently-asked-questions
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