At the time that Bill and Becky announced the changes in the 450 -> 600 and the 490/495 -> 609/610, this question came up. I remember that Becky wrote that getting these pickguards available would be something that they would do.

If Bill and Becky do not have some available, I would try Warmoth and see if they can cut a set using BL sizes. Others do sell blank pickguards, also, which a rotozip or other band saw should do just fine on....