Just some first hand experience to hopefully help some others. I had been using one supplier for acrylic prints and wasn't stoked with their work. So I recently tried https://www.acrylicmountingonline.com.au/
I am in no way affiliated with them other than have a wholesaler account.
Here's an A4 print I just received. I paid extra for metallic paper, which adds some pop.
Safe to say I can recommend you give them a go if you want some prints on acrylic.