12.5% 1/8 Het. Albino
12.5% 1/8 Albino
12.5% 1/8 Cinnamon Het. Albino
12.5% 1/8 Pastel Het. Albino
12.5% 1/8 Albino Cinnamon
12.5% 1/8 Albino Pastel
12.5% 1/8 Albino Pewter
12.5% 1/8 Pewter Het. Albino

This is a copy/paste from the genetics wizard on World Of Ball Pythons. So you would have a 1 in 8 shot at producing the albino pewter. Not too bad considering you're trying to make a tripe gene combo with one recessive morph.