I have a 1957 Oliver Super 55 that needs the fiber type element that goes under the metal breather cap on the hydraulic unit and transmission.  The local implement dealer(long time Oliver dealership) can get me one but I need two.  They tell me this item is no longer made.  Anyone have a spare NOS one they'd be willing to sell?  Anyone have any information or ideas  <!-- s:( --><img src="{SMILIES_PATH}/icon_sad.gif" alt=":(" title="Sad" /><!-- s:( -->  <!-- s:x --><img src="{SMILIES_PATH}/icon_mad.gif" alt=":x" title="Mad" /><!-- s:x -->  <!-- s:? --><img src="{SMILIES_PATH}/icon_confused.gif" alt=":?" title="Confused" /><!-- s:? -->  <!-- s:? --><img src="{SMILIES_PATH}/icon_confused.gif" alt=":?" title="Confused" /><!-- s:? -->  <!-- s:? --><img src="{SMILIES_PATH}/icon_confused.gif" alt=":?" title="Confused" /><!-- s:? --> on a suitable susbstitute?  Thanks.