Meme-Free Zone

For the Weinbaum RPG I need pictures of the outer planets. I don't particularly want to use photos, they rarely print well and use an inordinate amount of ink, I'd prefer black and white line drawings.

Anyone know of a copyright-free or expired source? Preferably reasonably detailed, but accuracy isn't actually a huge issue since I'm not looking at terrain maps. Can't seem to find quite what I want via Google, I'm wondering if there is something like a 1920s-30s text book that has gone out of copyright and is on line somewhere.

Later - I've decided to bite the bullet and go with colour, using a watercolour effect on NASA photos, but make the colours fairly pale so that they don't saturate printer paper too much.

My nephew starts college in a week or so, and I'd like to give him a suitable gift, preferably something reasonably practical. He's got a bike, a laptop, etc., but there must be other things that would be handy, and preferably not hugely expensive. He's studying design and engineering, don't know if that suggests anything.

Any thoughts?