I had this happen. I got a piece of plastic hose, from the auto store, that fit in the hole (glued) and then put the rubber hose on it. Hope this trick works for you. Possibly you could find a barbed hose union, to do the same.
https://www.amazon.com/Swordfish-60840-Straight-Connector-Assortment/dp/B09ZZKCBYV