Change the above dehydrated to RE hydrated, thankyouverymuch.
The only time and place I have ever had them was in my hometown so nothing to compare them to, meezie.
May be just a "good" childhood memory, but I would certainly like the chance to put this quest to bed.
My mom brought them home and in doing so implied those little buttery (and crumbly) squares of plump raisins were a treat.
To my thinking treats are a spur of the moment experience (a surprise if you will) so was thinking you could maybe make up a few batches from the most likely recipes (for a blind taste test) and FedEx to the mimi.
Make certain that no hint of the arrival of the fruits (pun intended) of your labor are dropped so the element of surprised will be maintained.
I still have a hundred or so white paper baggies hanging around so after I mark them (ABC format ok?) will get them right to you.
I will then consume and rate (mine, ALL MINE, hehehe) in order of best to last.
You will then post the winning recipe to share with psg (maybe one with tapioca) so the OP's thirst may also be quenched.
Two birds, one stone (ok then, raisin ;-)