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Lowe’s has Project Source 1 inch white mini blinds on clearance, save 75%. YMMV!

Project Source 1-in White Vinyl Room Darkening Mini-Blinds (Common: 29-in; Actual: 28.5-in x 64-in) – $ 2.11
https://www.lowes.com/pd/Project-…in/1017029

Project Source 1-in White Vinyl Room Darkening Mini-Blinds (Common: 34-in; Actual: 33.5-in x 64-in) – $ 2.49
https://www.lowes.com/pd/Project-…in/1017067