I have no idea how knowledgeable the OP is about 120 film. Not very I assume otherwise he/she would have known that 120 in bulk isn't available. However if he/she is contemplating 120 and MF photography I'd hate to put him/her off by painting an overly bleak picture about the availability of 120 film.
In B&W Ilford duplicate all their 35mm films in 120 and to a lesser extent so do Kodak. In colour neg there is still a good range of 120 as well.