Hi Bec,
I have been endlessly searching for a solution too, had really bad ms from about 7 weeks, it feels like it is just starting to ease now, though have only thrown up once, I have had 24 hour nausea. This is what I have been doing:
I have been eating pretty much all carbs, quite frequently

though not happy with what it is doing to the size of my belly

I have an extra large fruit chiller drink from Gloria Jeans in the morning every day, like a slurpee, the combination of cold and sweet seems to work
I have found that when ever I think to much about it I feel sick, so try hard not to think
lol
I suck on fruit tingles or any other sweet lolly any time I have the gag reflex, I go though about 2 packets a day, this have been my life saver
I stopped taking my multi vitamin as it was making me sicker, I was on Blackmores, even stopped the Blackmores morning sickness as a trial and felt better (perhaps Blackmores uses a tablet base that does not agree with me) (still taking folate of course)
I tried drinking ginger beer and eating ginger, but not fond of the taste, and most cold fizzy drinks work the same. I have heard that Coke is great for ms.
Salt and vinegar chips
That is all I can think of. It is truely horrible, but hopefully it will ease for you soon, and keep in mind that they say having ms is a positive sign and is linked to lower chances of miscarriage.
GL xx