General ⇒ calligraphical lower case z

[waxranger]

Hello dear readers

I have a question about the rsfs package. I need to do some mathematical notation regarding the z-transform and for the calligraphical letters I'm using calrsfs in mathmode. The capital Z is for the direct transformation of a continous weight-function, this works fine with calrsfs. But I need a lower case z to indicate the transformation of a disrete function but calrsfs can only do capital letters as far as I'm concerned. Is there also a package like calrsfs for lower case letters?

regards
Fab