Does Solid Ink A Very Handy Book From The Master Of This Business What Website Is It Cheapest To Order Solid Ink Blocks And A Maintenance Kit For The Xerox Phaser 8500?

What website is it cheapest to order Solid Ink Blocks and a Maintenance Kit for the Xerox Phaser 8500? - does solid ink a very handy book from the master of this business

I currently pays 3BLOCKS COLOR $ 88.99
6BLOCKS black $ 88.99
Detailed Maintainability # 108R00676 KIT-$ 149.99

Does anybody know where they get for less?