I need a new one of those rubber tubes that are on the end of the gas tank tube.  It looks simular to this http://www.busdepot.com/details.jsp?partnumber=251201119D but it is wider and has 2 flaps inside that keep the gas from flowing upward. Not sure of the exact name.  I have an 83.5 with the metal filler tube.  Any help would be appreciated.
 
Also, when I topped off the oil this morning a small rubber gasket fell out of the cap and appaered to disapear into the bumper or somewhere. I need a new one of these too.
 
Thanks,
Bryan