I am so sorry for your loss. Do you have any pics of Ellard? We'd love to see this guy who had such a powerful impact on your life and recognize him for the wonderful bird he was.
I can identify with what you are going through. I shared a deep bond with my first bird, a cockatiel, who passed away after nearly 18 years of kidney disease. It took two years before I was able to get another bird, and all that I knew was that it couldn't be another cockatiel.
So I got my first eclectus, a male that I named Bixby. We grew extremely close in a very short span of time. Deeply bonded. But unfortunately he'd been born with PDD and passed away earlier this year just shy of 2 years old. I was devastated, and it grieves me still.
I have two ekkies now, however. One male and one female. The female, Maya, I'd gotten while Bixby was still alive and strong. The male, however, named Jolly, was offered to me by a friend and fellow member of this forum (Laura/Labell) after Bixby had passed. And I told you all this to let you know that getting another male eclectus didn't set up unfair expectations of comparisons in my mind as I'd feared might be the case. They were VERY different, and their personalities do not even lend themselves to such comparisons. And I found I was able to love one without marring my love, or memory, of the other. Know what I mean?
Ekkies are quite unique, IMO. I don't know if I could truly say there is another bird like them. And I've found that I'm very much an ekkie person. And if you find that you are as well, just keep in mind that you may not be setting up the unfair situation for the new bird that you currently fear you would.
A new bird will never replace Ellard, ekkie or otherwise. But I think you'll find that your heart has room enough to love another... ekkie or otherwise.