EDIT:
The 2008+ ninjette doesn't come with spools, but the good news is it comes with spool bosses. Those are just open screwholes in the swingarm that make it easy to just screw spools into them. The prior generation ninjette didn't have those.
You can buy spools just about anywhere, the ninjette uses standard 10 mm spools, which is one of the most common sizes. To install them you just put a dab of loctite on them and screw them right in. Pricing is probably $10 on the low end and $30 at the highest end.
There are plenty of different bike stands out there, but the market leader is probably the pit bull folks:
http://www.pit-bull.com/
Not the cheapest, but they are built well and will last for decades. Most folks buy the stand that can be used with or without spools just by flipping the mount on the stand. Using spools is a much more secure way to hold the bike though, so if that's an option it's probably the way to go.