Try here: <!-- m --><a class="postlink" href="http://www.korvesoliver.com/">http://www.korvesoliver.com/</a><!-- m -->

and/or here:

<!-- m --><a class="postlink" href="http://www.tractorpartsasap.com/Oliver_Tractor_Parts_s/8.htm">http://www.tractorpartsasap.com/Oliver_ ... ts_s/8.htm</a><!-- m -->

The second link does not show the manifold on their site, but they do have a phone number...give them a call.