In the online Liste, there are two links to images of P54 from Princeton. One link is dead (404), and the other seems to link to P20, not P54.
For reference, here are good URLs:
- P54 at Princeton: https://catalog.princeton.edu/catalog/99104603973506421
- P20 at Princeton: https://catalog.princeton.edu/catalog/99104611933506421
If INTF cannot use these images of P54 in the VMR, there are older images from Princeton apparently in the public domain: Category:Papyrus 54 - Wikimedia Commons