I researched a few places before deciding to commission a custom painting from Reidsart a few years ago. It was a beautiful piece for the in-laws (picture of a new baby). The painting (pastel) was really amazing. He’s not the cheapest option but I think his paintings are far superior to any of the other cheap places (do your research carefully, I found the cheap places send out, mass-production style to low quality china painters!)
Will definitely purchase again.