purchase thermoelectric units / modules

Good Morning All,

I am looking to create a product using a thermoelectric device; I am spending
vast time in the creation. I am looking for specific specifications in regards
to a unit that can be produced with all unit parts.

If someone could provide some insight as to a list of companies / contacts that produce
customized thermoelectric units it would be much appreciated. I am looking for
a small unit >or equal to 1 inch diameter (module) with a built in electric unit (fan). I am looking for cid unit to power a circular cold plate no more than 4 inch in diameter.

Please provide some insight.

Lino