LynxMotion do a biped kit, as do a few others. They are pretty pricey though.

Failing that you could adapt a Pino, they are pretty cheap on ebay, look pretty cool and the outer shell comes off easily but it may be tight if using standard servos over mini servos. Or a robosapien V1 or V2. Just search ebay for robot toys and you'll find a bunch of bipeds just waiting for an EZ-B to be thrown at them.

Why not this new Optimus Prime Maximus? It's big, it's all hollowed out and ready for customization! Best of all it's cheap! They go as low as $18 used on Amazon...

http://www.amazon.com/gp/aw/d/B0085K1OYS

I can't seem to post a pic I'm on my IPhone...

@Doombot Jeremie (skater_j10) actually robotized an optimus prime Here's his thread. I don't know if he ever got it walking, but it's still pretty cool!

@robothacker Have you checked for a FabLab/Hackerspace in your vicinity? You might be able to use their 3D printer to print JD.

Yeah I've seen that. It's actually a brilliant idea, you can even mix and match parts off different transformers (kitbash) I'm surprised not more people do this here.

I'm almost done with my platform, I will post pics soon.

You will be able to buy the revolution parts soon

@dj sures that will be awesome but i wanted to know if i can design my own humanoid robot and send it to you to print it and i buy the ez-robot kit and the humanoid robot that i designed

@robothacker EZ-robot is probably not going to print everyone's robot, as that would take too much time. As I said before, your best guess is to find a nearby hackerspace or fablab. Alternatively you could also use shapeways or a similar service, but that's very expensive.

@niek thank you for information i got it i will try to find a near place to print them or use metallic substances but the only problem in metallic is the head of the humanoid robot it will be very difficult to be assembled