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rs-online Australia sell 01 steel (as "Tool Steel Rectangular Bar") in suitable sizes (e.g. 5x25x500mm) (Same day despatch on Steel Rods, Bars, Tubes & Hexagonals parts | RS Components)

hills heat treatment in bayswater is the one most guys (including some professional knife makers) use (and recommend) here in oz of they don't/can't do their own.

Hey john, welcome aboard.
I’ve made half a dozen razors (for my own amusement and to give me razors to practice my honing), and even if you have fair mechanical aptitude the learning curve can be...