I had a very similar issue. The answer is a Kramer FC-4, but it's expensive :/
The FC-4 is a high performance format converter for RGB on a 21-pin RGB-SCART connector. It converts an RGB signal to a component YUV output.
? Bandwidth - > 5MHz (-3db)
? Input - 21-pin Scart connector for RGB Video
? Output - Component video (YUV)
? Compact Size - Part of the Kramer TOOLS™ family of compact, high quality and cost effective solutions
Applications
? Any display system requiring conversion between RGB SCART and YUV
? Multimedia, home theater and presentation applications
? Ideal for DSTV decoders (PVR & DualView) with Scart outputs.
http://avshop.co.za/catalog/product...d/977?osCsid=20cb27f7e61e69366a4f3ac05a838c17