FreeScale smartMOS processes 6,7,8 satisfy this. They are not offering complete foundry to the general design community but I cannot believe they would turn away good business. ST and Infineon also have such internal processes that they may consider acting as foundry given current business conditions. TSMC CHARTERED etc do offer basic HV process which are usually single n & p LDMOS (or extended drain) type HV components and diodes. However these are usually just single flavoured e.g. if they offer a 40V process they have a 40V LDMOS probably a 20V LDMOS but nothing in the 5 to 20V range so the chip size is compromised. NPN and lateral PNPs come as free but unlikely to have zeners, schottkys etc.
Also, they typically do not offer high side drive capable transistors (floating wells).