There are some good deals on inserts and screws out there at the moment if you want to make your own tools.
Moligh doll 5Pcs Turning Carbide Cutter Inserts Combination Set for Wood Turning Working Lathe Tool with Screw : Amazon.co.uk: DIY & Tools
Moligh doll 5Pcs Turning Carbide Cutter Inserts Combination Set for Wood Turning Working Lathe Tool with Screw : Amazon.co.uk: DIY & Tools