Ilford is taking orders for various odd format sheet film.

2.25x3.25, 6.5x9cm, 3x4, 3.25x4.25, 9x12cm, 4x10, 13x18cm, 5x12, 6.5x8.5, 18x24cm, 7x11, 7x17, 8x20, 10x12, 11x14, 14x14, 12x20, 14x17, 16x20, and 20x24.

Full details here.