Woot offers Imperial IBOA300-1 1-1/4" Multitool Blade White for $5.97. Free shipping for Prime Members. 

Product Description:
Imperial Blades was founded with the sole mission to provide highest quality and most innovative oscillating multi-tool accessories. Imperial Blades has stayed true to its promise of delivering innovation with it’s One Fit™ universal anchor in 2009 as we

• All Purpose Blade: Ideal for wood and wood with nails
• Additional Applications: Non-ferrous metals, nails, thin sheet metal, hardened fillers, plastics & fiberglass
• Project Work: Cutting door jambs with nails and/or staples
• Fits majority of multi tools, universal fitment: compatible with Milwaukee, Ridgid, Ryobi, Bosch, DeWalt, Dremel, Fein, Makita, Rockwell & more
• Made In U.S.A
• ONE FIT ARBOR
• Fits: Fein, Bosch, Makita, DeWalt, Rockwell, Porter-Cable, Milwaukee, Craftsmen, Genesis, & More
• Adaptor included to fit Dremel Quick Release and old Rockwell