Does anyone have tips on where to buy sheets that will fit an IKEA toddler bed other than IKEA? The mattress seems to be kind of an odd size - 28" x 63" (70 x 160 cm) - so it's too small for twin bed sheets, but too big for crib sheets. IKEA only offers fitted sheets in white and green, neither of which I love for my toddler's bird-themed big girl room (lavender walls, magenta & white printed carpet).

Thanks for any leads!