glassteelhammer is right: totally repairable.

would either buy a zipper yourself (so like - so can insure the quality) and bring to a good drycleaner who offers mending. (this path saves you $$)

or bring to a tailor. (get quote first - and be prepared to go to 3-5 tailors... I once didn't get a quote for a pair of jeans and was $90-something dollars! ouch, but my fault b/c didn't ask for a quote - and while coulda left those jeans there, never picked-up.. did like them)