I couldn't find the link but was able to find my contract and it had the phone number. MAGIC KINGDOM Engagement office at (407) 824-5130. Try this. If not I would just call Disney and ask.
I looked at my contract and it cost me $305. For that they roped off the rose garden for just us. When we checked in to the Poly, there was a "Special" invitation to a disney meet and greet the characters party. That is how they got us there. Although I have to admit that my wife was upset that we had to stop going on rides to go to it! ha ha. Anyway you go through the rops and down to a little set up in front of the boat dock facing the castle. They had a love seat, sparkling cider(no alcohol in the MK), roses, a glass slipper(engraved) and such. Then after I did it you got to hang out as long as you wanted. It was really cool. People lined up on the bridge to watch and cheer. It was nice to be all alone at disney for a bit. Like I said she talks about it all the time and says it comes real close to even beating the day our daughter was born! lol
Anyway like I said they had sent me a whole package with things I could do. I think it was $500 for the same thing at night during the fireworks. Then you could add on things like Mickey and Minnie(the real characters), violinists, limo's etc. But that gets really really $$$$.
Otherwise the giftsofalifte time planned a really nice thing too for me but I just chose disney instead.
Good luck and let me know if you have any questions.