Hi mate, welcome to MW.
Here's a good place to start. Just surf around to check out which kits have been produced in plastic and resin. Boxart, instructions, etc. are all there too.
http://www.macrossworld.com/macross/models/_models_index.htm
For completed examples you're best off to search through MW. There are a few Chinese and Japanese websites around that do a lot of Macross, but can't help with links - I usually follow someone else's.