Buffer/Data, size in RAM

here is a way, trick or spell to resize (extend) the length / size of a buffer dynamically? seamlessly without losing its contents? I use many buffers in a project and which will be ignored as the tempo of a recording must reserve the maximum amount, but this has a cost in RAM. I can not find the object or external buy on Amazon, open the door, sign, and install more ram on the fly.

PS: I have given enough information about what I'm working, I do not like to see that Cycling74 appeared with an app based on my project.