Are there any plans for portable PS1?

Are there any free plans available on building a portable ps1?

 

yah, its called a psp with custom firmware

 

I know about that, but was wanting plans for making a portable ps1 (old grey psx). I wanted to do something, since I have some free time on my hands and realized I have a couple of old ps1's lying around. I wanted to make something similar to what Ben Heck has done.

 

i wouldn't think that it would be hard