Include Roman numerals in pages in Bibtex output

[Frontoish]

I regularly import bibliographies from a journal's list of books received for review, using the web interface.
Many books use Roman numerals for the pagination of front matter, and Arabic numerals for the rest, so their page extent may be given as "xii, 235" etc. E.g.:
Walter Ameling, Centre and periphery: working with the inscriptions of Iudaea/Palaestina. Antiquitas, 1.76. Bonn: Habelt Verlag, 2022. Pp. xii, 205. ISBN 9783774943612.

Anystyle is doing a good job of recognising these as page extents and correctly tags "Pp. xii, 205" in the example above as pages.
However, when I save the parsed results as a BibTex file, the Roman numerals are omitted and only ", 205" ends up in the pages field.
Can the BibTex output routine be improved to retain strings consisting only of the characters i v x l c d , as well as the comma and Arabic numerals?

Many thanks for such a useful tool.