Memoji Contact Photo

Hi. I recently upgraded from an iPhone 6 to an SE 2nd Gen and with that came the upgrade to iOS 13. The first time I went to send a text, after upgrading, to a friend of mine who was already using iOS 13, a little banner popped up at the top of the message app that asked if I wanted to use the Memoji my friend created of himself as the profile picture in his contact on my phone. I accidentally tapped ‘No’ but now I’ve decided I do want to use the Memoji he made and shared instead of having to make one myself for his contact photo.

Is there any way I can get his Memoji back and use it as the photo for his contact? I couldn’t find a way other than making it myself or having him send it to me, but I’d rather not do either of those.

Any help would be greatly appreciated.