I have found and bought one : Dörr Combi TTL Flash for 250 € on ebay
http://www.doerrfoto.de/Produkte/Article.aspx?productline=1868&articlegroup=1887

http://www.doerrfoto.de/Utils/ImageReader.aspx?image=1954.LeftImage.png

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description (from german) :
Combiflash flash TTL for PENTAX and SAMSUNG With DÖRRCombi Flash it is 2 devices in one -> an attachable flashgun which can be extended to the macroflash.

Use the main flash for every "normal" motive. With the TTL - flash automatism it is not necessary for adjusting. The bright amount is measured fully automatically and adapts itself to the respective motive.
The flashgun is ideally suitable for fast snapshots. With the reflecter, light reflections and shadows can be prevented by indirect lightning. The flash angle can also be adapted to focal length, the Combiflash possesses a zoom reflector.

If you liked to take photos in the narrow and macroarea, you need to stick on the macro-ring flash in the main device.
The main flash is inactive with that. For aimed shadow the flash halves can be also turned on separately.

Max. Guide number with ISO 100: 34
Controls TTL: P-TTL for Pentax and Samsung
Zoom shot reflector: 28, 35, 50 and 85 mms, manually adjustable Schwenkwinkel: 0 °/30 °/45 °/60 °/90 °
AF red light-measuring ray: range approx. 1 - 5 m
Exposure control announcement: green LED at device back
Flash readiness announcement: red LED at device back flash
Flash duration : approx. 1 / 500s - 1 / 30.000s
Flash future: approx. 0.5-7s
Flash number: approx. 150 - 2.000
Clour temperatures: approx. 5.500 K (corresponds to daylight films)
Button : in device back
Energy: 4x1,5V AA Mignon batteries (Alkaline) or NiMH of the same type
Weight : approx. 250 gr (without batteries)
Dimensions: approx. 85x73x120mm

Technical data for the ring flash
Max guide number with ISO 100: 6 (one side), 8.4 (both sides)
Color temperature : aprox. 5.500K
AF help light: 2 x inside ring flash
Weight: aprox. 190 gr.
Dimensions : 120 x 120 x 30mm (without cable)
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Frederic
www.flickr.com/photos/fs999