Be thankful you no longer have it as a choice. As I've warned before, BufferMount is a severely compromised product, and is better gone from the marketplace.
ColorMount works fine on fiber. There use to be a variation called ArchivalMount, but I don't know whether it is also available.
You just need to come to terms with what exactly "archival" (assuming that was the reason you used BufferMount) means to you and your prints.