Oster Breadmaker Window Replacement?

Does anyone know where I can get an Oster Breadmaker (model 4811) breadmaker window replacement? Oster says it's not a replaceable part. But, I managed to remove the old window easily enough and just need the glass replaced. It's 3 (1/8) inches on each side square. It's crazy to replace the entire unit, when only the glass needs to be replaced. The old window is completely smashed.