There was a thread about this not too long ago. Issue here is that VGA only carries video so the converter/cable would have to have an input for at least 1 VGA and 2 rca so I imagine this is a pretty tricky thing to do, as well as there probably not being much of a market for it, considering that most displays with HDMI inputs already have VGA and DVI inputs.
The audio issue is only a problem if you're planning to plug all outputs into a receiver. You could plug the vga to hdmi input into a display and the audio to an amp and you'll be fine. But that's such a rigmarole. Why do you need it? Do you not have a DVI output instead as I know DVI to HDMI cables are fairly common...
You could try you local ZAK speed electronics store, but AFAIK there is no such thing.
You do get a SCART converter, Component RBY to SCART input/Output
But that would be from music/home centre to TV
Whenever possible rather go for component in/out than VGA, better quality.
VGA breaks signal into 2 Audio 1 video, component breaks video into Red, Blue Yellow, seperate audio cable breaks into standard 2 Audio.
The point would be that i need to clean up my wiring. I don't have the HDPVR decoder. so now I have the HDMI cable for the DVD running to my wall mounted tv as well as the RCA cables. This is all coming from my AV receiver. If I could get a RCA to HDMI cable then I could Connect the DSTV decoder to the AV processor and only have the HDMI cable running to the tv.
My company does stock two types of these converters VGA & RCA Analog / Stereo Audio to HDMI and DVI / SPDIF Optical Toslink or Coaxial to HDMI. Both converters will combine the Video (Either VGA or DVI) and Audio (Either RCA Analog or Digital Toslink / Coaxial) to HDMI (including both audio and video and the DVI/Optical to HDMI converter also has a passthrough for the audio to connect it to an amplifier or receiver if needed. When the audio/video has been combined into one HDMI signal it can be switched, distributed/split to multiple displays and the signal can be amplified/equalized to reach longer distances. Not sure what the rules of this forum are regarding posting of external website links so please pm me. We have stock on the DVI/Digital Audio to HDMI converters and are expecting stock on the VGA/Analog RCA to HDMI again in about 3-4 weeks.