Allan, I don't know why I'm just seeing this now, but I am so very, very sorry for your loss.
I love the name you gave him, Zackie. That was so... cute. I got very teary reading all these posts, especially the one you wrote about burying Zackie. I know you said you want to get a stone for Zackie's grave. A bunch of us YT'er went together and got a very nice stone for Connie whose mother died and I just bought a memorial stone from this company. They do wonderful work. Their website is
www.rockitcreations.com Just a suggestion. Whatever kind of memorial you get for Zackie I'm sure will be nice.
You take care and know that we are all thinking of you. Rest In Peace dear Zackie.