i got i 1989 hmc with a 454 chevy ok conditions but is has a broken winshield. anybody knows where can i get one . thanks

You could ask the HMC club people, http://hmcclub.homestead.com/
Or post on the HMC forum, http://groups.yahoo.com/group/HMC-Club/
This co. shows Hawkins on their list of replacement windshields,
http://www.dcmco.com/dcmrvcomp.htm