DMP 322 Transformer

I know most people here are more in the fire alarm field, but does anybody own or have ever installed a Digital Monitoring Products model 322 transformer? I’m looking for an alternative way to power my DMP XR-500 panel (demonstration use only) instead of the plug-in transformer. I can’t find a manual in order to find the dimensions of the enclosure, and due to the limited space I have available on my demonstration board, I don’t want to purchase one if I don’t know it will fit.

Here’s the product page on the DMP website: https://buy.dmp.com/dmp/Shop?DSP=30100&PCR=1:100:10011:10062&IID=322