Where can I find rare-earth magnets?
More magnets than you can shake a metal stick at can be found at Applied Magnets. I strongly recommend you order more than you think you need because: 1) They’re cheap. 2) You’ll go through them faster than you think. 3) If you don’t order enough, they’ll slap you with a ridiculous “low quantity” fee. You can actually order more, not suffer the fee, and pay less.
Easy: A simple parts swap. Little if any paint.
Basic: Some modified parts. Mostly a new paint job.
Moderate: New and modified parts.
Skilled: Lots of new and modified parts. “Frankensteining” often involved.
Advanced: All of the above, plus a great deal of original sculpting.