Hi Gege...
Unless someone else pops in with info. I would advise you to take this picture to a local plumbing supply company and see if they can identify the make/model and get a part ordered for you.
Otherwise, if it is only the porcelain part of the handle that is broken you may be able to take a small plastic pipe, for example, and cut it to the correct length and install it to the handle..should give a reasonable presentation and at the least take the eye sore away...
You could also make your own out of clay and have a local potter fire it up with a porcelain glaze and then install that....just another idea...
Check back later tomorrow and see what others think.
Good luck...
MARK
.