Best way to change FS_PAGE_END_ADDR or use Peer Manager from RAM?

Using nRF52 with SD 132 3.0.0.

Peer manager uses fstorage to store information. I need to be able to specify the address range which fstorage can use. Is there a configurable way to do this? Right now my solution is to modify the SDK library fs_flash_page_end_addr() or FS_PAGE_END_ADDR to use a correct end address.

Alternatively, is there a way to configure peer_manager to NOT use fstorage? If we could configure it to just use RAM, that would be preferred. We don't need peer_manager data to persist.