Google "fork bending mandrel". There are a lot of ideas for wood forms you could use to do it yourself. In the end, if you mess it up you will be in the same situation you are in now, wanting a new fork. Reynolds is the only company I've found that sells a pre-bent blade so it's safe to assume that all of those curved blades on hand built bikes out there were bent by the builder. It's just a question of how much effort to put into this fork before it's easier to wait for the builder you talked to.