plastic notebook covers from OfficeMax
In search of something similar to Levenger's Circa notebook covers, I think I found a decent one at OfficeMax. They had a small section for binding supplies. One of the lines of product there is the "Ibico compatible" comb-binding supplies. Someone may have mentioned these on here before. I can't remember.
OfficeMax had a couple different translucent plastic covers that seemed pretty thick - slightly thinner than the Circa notebook covers, but still sturdy. The sheets are not punched, and they come in packs of 25 for around $17. Anyone tried these?