There is ongoing work on Balinese palm-leaf manuscripts on Wikimedia sites. This started with a project grant to add manuscripts to Wikisource and is expanding with a Wikicite grant to catalog privately held manuscripts in Bali. As part of the Wikicite grant, manuscripts are being added to Wikisource as a single image containing the first and last leaf. See more background here and an example manuscript here.
The reason these manuscripts are being added to Wikisource in partial form is that there are many manuscripts to catalog and it's important to make information about all of the manuscripts available first before proceeding with further digitization. The text content on the first and last leaf is still very useful.
Unfortunately ProofreadPage does not fully support jpg/png format documents. If you put the standard <pagelist /> tag under Pages on the Index page, ProofreadPage returns "Error: file not found" instead of a page list. You can work around this by manually entering wikitext in the Pages field such as (in the above linked example) [[Page:Bali-lontar-Tojan-Candra Graha.jpg|1]]. But this is not ideal because you lose the visual indication of proofread status that <pagelist> provides.
This is a very simple fix code-wise and I'll submit a patch shortly. What I'm less certain of is if it's a good idea or if there are other unintended consequences. Feedback appreciated!