Easily available over the internet – this is the well established standard for parkjets, giving a nice turn of speed and around 6 minutes of quick flying.
Motor – 2212-6 2200kv motor – (Hobbyking brand 2826-6 2200kv)
Battery – 3s 2200mah 30-40c
I particularly like Hobbywing Electronic Speed controllers (E.S.C.) – 30A.
6x4s – there are many brands out there, but I find APC props are quite reliable.
If you search around you can find combo kits very cheap. Some are better than others so if you do go for this option, test thoroughly!