Princeton University has digitized many of its manuscripts and they are available online. The Garrett collection has 2,469 Arabic manuscripts, of which 32 are relevant to Yemen.
One of the manuscripts is a series of eulogy poems, mainly for the sultan al-Malik al-Nāṣir, by the late Rasulid scholar Ismā‘īl al-Muqrī. It can be accessed here.
Here is the first page of the manuscript: