i got my german speaking brewing friend to do some digging online and he found the data. website is here. there are 4 tabs for 4 different geographic areas, and the one that's useful to us is koln-rechtsrheinisch. for those of us who don't care to learn german, the numbers are:
there are no numbers for carbonate (CO3) or chlorine (Cl), but there are numbers for nitrate, fluoride, an phosphate. these numbers seem to be in line with what mrkristofo posted, maybe a bit lower. i'd say as long as you're in the ballpark between these sets of numbers you're good.