Vacuum Door Locks on a 9186 420 SEL
 

Does anyone have any suggestions on where I can purchase the parts of the vacuum lock system. I have a diaphragm which is bad and is not repairable. I have searched for the numbe on the unit (033732-2) but cannot find the unit. I would suspect I would nee the bottom housing that snaps on to hold the diaphragm in place. The rest of the body is OK. Any suggestions as to the part number and or purchase location would be greatly appreciated!!

Many thanks in advance!!

Mark