HI Gary
http://www.elecfree.com/circuit/powe...-power-supply/ here is a basic circuit for a linear regulator with values. It uses a T03 case regulator and minimal parts.
You could replace the lm338K with a newer 338t T0 220 package as well.
You could very well get by with different capacitor values as you only require it to feed a TEC device. If its going to be a permanent power supply then by a torroidal transformer that has at least 9v secondary capable of the current.
PM me if you want or email me at
jeffkop@internode.on.net ... We can sort something out no problems