How to fulfill POD art?

Hi! I made an unexpected sale and now I'm scrambling to figure out how to fulfill it. (By unexpected- I just mean that I figured Etsy was saturated and My items are unlikely to sell without ads). But tonight I heard that magical cha-ching! I sold a wall-art poster item.

I had planned on using Printify but I trialed them by ordering a gift for a friend on Dec14 and it didn't get to her until after Christmas. I also ordered myself a sweatshirt and it shipped late and arrived a few days later than it was scheduled. I really don't want an early sale to be a negative review, so I am thinking of printing the item at Staples even though it costs more. Just to have better control over timing... If any of you happen to sell POD wall art, how are you fulfilling?

And in case you're curious, nope, it wasn't AI art.