MLBW, did you ever find a liquid calcium supplement? This is for your baby? I found Floradix Kindervital at 360 (this contains 120mg of calcium per daily dose for babies 6months - 2yrs). Apparently Floradix has a 200mg liquid calcium supplement, but I haven't been able to find it anywhere.
Floradix does have a calcium and magnesium supplement. They should also have it at the 360. You can also check IMI in Central?
I was told that a supplement with both calcium and magnesium is best (unless you're really not getting enough calcium) because magnesium helps with the absorption of calcium. In fact, magnesium should even be at a higher dosage than calcium!
This article above is a great one about calcium. It's also a long one so you can really just start reading from "my position on calcium" and onwards...
So far, the Salus calcium/magnesium has been the best one i've seen thus far on the market!