replace h1 tags with h2 tags

For a redesign project with lots of legacy content I want to prevent the inappropriate use of H1 tags in content, but I don't want H1 tags to be converted to P tags, which is the default behavior when removing H1 tags from the whitelist.

Does this module provide any interface (graphic or programming) to replace the H1 tags with H2 tags?

I guess I'll have to write a custom module but I think this feature would be a good fit for the module.