Do what you think is best and explain your justifications in the documentation. It sounds like you should start from scratch. "I created this new module, because adding to the old modules wouldn't get the job done." IMHO, these "not invented here" commandments are guidelines that may not apply to every situation.

I started using Class::Std to build getters and setters. Then, I discovered Object::InsideOut met my needs better. The author of Object::InsideOut explains why he created a similar module. I accepted his justifications. I have a colleague that says the author of Object::InsideOut should have improved Class::Std. But, I say the authors had his reasons and the result works better.

Starting over is not always bad. But don't reinvent without a reason.