pef wrote:www.ddg-heating.com in Belgium offers a little what you are looking for, except for the price question.
You can also look here, the prices are very interesting.
http://www.kratki.eu/product_info.php?c ... ts_id=2839
Personally I'm going to turn towards complete self-build system drawing inspiration from what already exists. (Solder etc. is not a concern for me).
There are several very attractive and safe models Alize at very attractive prices example: Vulcano [/ b [b]] € 1740 ttc , both DOMALIZE at 1780 € ttc, theECO-BOILER a € 1790 ttc and the new model ACALIZE is a 2590 including tax 80% yield. They are all supplied with the draft regulator. The heating body is made of 5mm steel. The system is a tank and not a coil hence the difference in power and efficiency.
They are visible on the following link under the heading boiler inserts: http://picasaweb.google.com/Amtec74 or site: http://cheminee74.com
Greetings
Helio