I got a flat of the dole cans from Costco for a good price.
https://www.costcobusinessdelivery.com/Dole-100%25-Pineapple-Juice%2c-6-oz%2c-24-ct.product.10181915.html
Amazon has it too
https://www.amazon.com/Dole-Pineapple-Juice-Concentrate-Count/dp/B002IGA2FW/ref=asc_df_B002IGA2FW?tag=bingshoppinga-20&linkCode=df0&hvadid=80195721144138&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=m&hvlocint=&hvlocphy=&hvtargid=pla-4583795269754418&psc=1