crypt nuri is definitely an option - here are some of mine (so you know what they look like):
(pink line variety)
(random nuri - they all differ a little)
(there is a third type i ahve but couldn't find a picture called something like pa hang - it has a bit more green - a leaf is shown in the bottom of the first picture that green leaf mixed in with the pink line).
-
My water is tds 140 (gh 6 kh 3) and it seems to grow fine. If you visit the states i can give you a few as i need to trim them down but i dont' want to mail overseas esp with the crap going on around here.
I've not tried them in super hard water so don't know for sure how tolerant they are but i could not grow them in super soft water that most of my aquariums have.
I did a google search on hardwater aquatic plants and this thread has some useful thoughts on the matter buti have no first hand experience:
"I have similar hard water. The type you need to work with hammer and chisel before drinking. I have great success with weeping moss (unfortunately), java ferns, mini swords (helantium bolivianum), hygrophilia polysperma, hygrophilia corimbosa, rotala rotundifolia, and a few others I forgot the name of. All of them grow like crazy. "