Tank bag?

Looking for a tank bag for my third generation 250 duke. So one made for the 3rd Gen 390 duke would probably work also.

Just looking for something to carry a small air compressor. Unless somebody else has a convenient way they pack one and keep it with them.

I'm fine with something cheap from amazon, I just don't know what works for people....

While we're at it, anybody have a suggestion on a small air compressor? Just enough to fill a tire if needed