Penko, In many cases I have found the product suport for older aircraft to be superior to that provided for some of the new stuff! The MU2 comes to mind along with the 400 series Cessna twins as being examples of this , on the flip side we are stuck with very poor suport for some of the new corporate jets. If one looks through Trade A Plane one can find all sorts of companies who part out and suport these older aircraft, on top of this there are those who obtain the rights to produce parts for the older fleet.