I can generalize this question to, "I'm knowledgeable in this methodology that is relatively rare in the market, yet respected (to those that have heard of it). Does it make sense to reach out to companies that are looking for experts in a different methodology I consider inferior?"
I'm figuring my angle could be along the lines of, "I see you're looking for someone with expertise in X, have you considered someone with expertise in Y? Here are the benefits: ... Here's my number if you'd like to discuss further: ..."
Would this be an effective approach, or is it a waste of time? Keep in mind, 95% of the jobs out there are looking for X, not Y. It'd obviously be more efficient to reach out to that 5%, but they're hard to find.