Need a small pc for a case mod. Know any good ones?

i wanna try and put a pc in a model 2 sega genesis case. given the size of the genesis im goin to need a pretty small pc. do you guys know any nettops that the motherboard could fit inside a genesis? one thing i was thinking of doing was maybe buying a netbook and take the mobo out and use that but it seems a bit of a waste and a bit costly. can any of you guys point me in the right direction where i can buy a small nettop?

 

Or check out Mini ITX, I'd guess it would fit.

http://en.wikipedia.org/wiki/Mini-ITX

 

http://www.techeye.net/hardware/15-usb-pc-creator-david-braben-in-talks-with-government

Look into an Elonex One laptop. Tiny netbooks basically. Can be had for £100 IIRC.

 

thnx i think ill look into those itx pcs. they seem like theyre gonna stay cool and could fit in a genesis with sum modifications to the case.