This is not just for wine bottles, but for any thick glass liquor bottle. You should be able to get all these parts at the hardware store. Print off the picture and take it with you or show the worker in plumbing, the picture on your phone.
Painted bottles: she uses tempera paints diluted with water and uses a syringe to put it in, and then uses a long plastic cap with water in it to hold the flowers, but I don't know where to find that. So I'd probably just try using acrylic paint instead.