OK,

Try going here:

http://www.peachparts.com/shopforum/showthread.php?threadid=21535&highlight=diaphram

If this link doesn't work, I found it by clicking on the SEARCH tab above, then typing in the word DIAPHRAM (no quotes), and clicking on the PERFORM SEARCH button.

Hope that helps. Again look for the thread started by 1994C220.