Cheapest place to get a 40mm square .25" copper coldplate?

[Jugernot]

Anyone know the cheapest place to get a copper .25" coldplate at 40mm by 40mm?

Thanks

 

[Viper GTS]

2CoolTek has 1/8" coldplates for $3.50, & I thought they had 1/4" as well. I'm not seeing them on their page right now, though.

Viper GTS