Re: print gi tops
What kind of print are you looking for? Both Bugei Trading and Tozando carry kendo uniform jackets with the Musashi print, which is a geometric pattern. Asian World of Martial Arts has a light weight camo gi for a demo team, but at 6 oz I wouldn't think it would hold up well in aikido. Ki International has a stars and stripes top.
I'm sure that a number of the online tailors that make custom clothing for re-enactment and medieval faires would be able to take a fabric of your choice and come up with something decent, especially if you sent them a gi that you have worn in the past for a pattern. Kyotokimono.com makes custom haori and hakama, so I would guess they would be a good place to start for something truly custom.
Good luck, and post a picture if you do something unique!