If Canna and other coco products are hard to find at a good price, whether local or online with delivery, consider Tupur from Royal Gold, which is coco-based with some added inert 'forest products,' is designed to work just like high grade buffered coco (or better), and at least for me is cheaper than Canna and other quality cocos. See
https://royalgoldcoco.com/royal-gold-soils/tupur/. The past few grows with my local hydro shop (HTG Supply) having closed I've switched from Canna Coco to Tupur from Amazon because it's the cheaper than the cocos at regional hydro shops and online sources and includes free delivery. I use it with no pre-buffering out of the bag with added ~20% perlite, sometimes mixing in recycled Canna coco at about 20%. In terms of performance and results, Tupur seems the same as my using Canna coco.