What exactly is Char Cheung?
I've never had it (god forbid) but by the sound of it, and your description, it's most likely based on a northern Chinese noodle bowl called "jar cheung mean" (cantonese pronuciation, or "zha zhang mian"(?) in Mandarin) which is noodle with minced pork and spicy fermanted bean paste.
As another poster mentioned, the "char cheung soup" could not be found anywhere else but s/he hasn't been to China. I can assure you that you won't find it in China either. It's Swatow's own concotion to please non-Chinese tastes. No surprise there.