If you do want a high quality design to get tattooed on your skin, you have to look towards the professional tattoo artists. Their art work is simply just amazing and I wouldn't accept anything short of a perfect picture to be tattooed on my skin!
It used to be very difficult to get access to the work of the best tattoo designers, but thanks to the internet, it is very easy nowadays. Most of the top tattoo artists have put down their work online and you can get access to it.
These tattoo galleries are the work of professional designers, so naturally there is a fee for you to get full access to their work. However, it is only a small one time fee, after which you can browse through all those high quality tattoo design galleries.