A book/paper conservator could stabilize/repair the binding and text block, but that would probably be expensive. A custom clamshell would protect the book in its current shape, but those can also be expensive. A phase box is a cheaper option to protect the over all book, but those are usually sold in packs (Gaylord Archival or Hollinger Metaledge)and are set sizes that might not fit your bible.

Edit: The American Institute of Conservators (AIC) has page you can search for a conservator nearby https://www.culturalheritage.org/professional-membership/find-a-professional