maybe Futurlec, an Australian company, delivers to AU faster than they deliver to the US ... lots of cheap led there.
www.futurlec.com
Don't worry about rain proofing. at the voltages you're using, you'll need salt water to conduct any voltage, and likely it'll just cause some corrosion. once you get it assembled and tested, paint the circuit board solder joints with some sort of anti-rust paint and you're done.
a hall switch or a reed switch both require one line from the pic. the hall switch needs to be pulled up/down, powered and grounded. a reed switch needs to be pulled up/down and grounded. so one less connection for the reed switch vs the hall. If you use one of the pins with an internal pull-up on your pic, then you're down to only needed two connections for a reed switch, signal and ground.
problem with a reed switch is response time and longevity. Most switches are only rated for a few thousand contact closures, and in the course of their normal life, this would be years and years. but spinning on a hub at 60+ RPM, you quickly accumulate thousands of contact closures. if this is a one time use project, it won't make much difference, if you want it to last, go solid state. Another thing about reed switches - they're spindly pieces of metal inside a glass tube, sounds kinda fragile to me, compared to the hall sensor which is just some silicon sealed in a block of epoxy.