We were told they were back ordered because the quilters have caught on to the fact the blades work in the rotary cutters. I will be on my way to Harbor Freight to get some. Do you use the magnetic bowls? I have one for pins, one for safety pins, and one for the hair clips that hold binding. I got the handle thing to suction to the rulers, and a canvas tote all that look like what you see in the high in quilt store. Go check it out. A quilters candy store too.