Wood offcuts (SG17 (Shefford))

I am replacing drawer runners under a pine bed and the new runners need a base strips of wood in a different place.

I need 2 pieces of planed wood, finished size 1" (25mm) x 1 1/4" - 1 1/2" (30mm - 33mm), min length 11" (28cm), max length 17" (44cm) - though I can cut as needed.

My local building suppliers don't have anything 25 mm / 1 " thick and that's the critical measurement.

I'd be very grateful if someone has a couple of pieces of wood I could use. Thank you.