Here is the link to the blade pricing you were looking for. They 'fit' Olfa, but are actually a replacement generic-type blade.
14.90 per 10 blades; 139.00 per 100 blades. Not tungsten blades?
If this link doesnt work, go to jhittle.com, then click on 'specials'. Scroll down to the bottom of the page for the offer.
http://jhittlesewing.funoverload.com...new_items.html