Some good places to get larger pacifiers would be
2. Little For Big
3. Etsy ( especially bedazzled ones!)
Bottles are usually regular bottles with the larger Nuk nipples on them! But as a 2-5 yo, you could probably get away with a few sippie cups!
Diapers can be found
2. Little for Big
Again with that 2-5 yo Little age, I bet you could also get away with Goodnites. They now offer an L/XL size that fits very nicely (im a 30" waist) and any of the Luvs/Pampers size 7 can be modified to work as well.
Caretakers can be found on several different places! I always recommend "Vetting" them in a vanilla sense before you open your Little side. I have had several great CG's/Big's and some not-so-great ones that were it in for the wrong reasons.
Best of luck! Welcome to our Little World