There is another view on acid-base that you should be aware of (if you are not already). According to this…school of thought (called metabolic typing) the same food (or supplement) can make one person more acid, and other more alkaline.
There was a thread on this ages ago but the search engine returns errors when I tried to find it.
JB replied to someone on the forum who was asking for a PRAL number for an item not listed that foods of similar types have similar PRAL scores. So if you’re looking for the number of something that’s not on the list, just use the number for whatever looks closest.