I have a 47 built in April, My pickup has the gas flapper filler door in the floor of the bed, I see pictures of side filler tubes, what years did they change?

The gas flapper in the floor was used on 46 and early 47 pickups.

I'm looking for the rubber grommet that goes around the gas filler tube where it exits the rear fender on the roundside body. Does anyone have one? know where I can get one? Or what will work there and still look good? How about the rubber grommet that goes around the door handle where it enters the door?

Service Motors should have what your looking for. or one of our other vendors. http://CrosleyAutoClub.com/PartsSuppliers.html

What type of gasket or seal was used around gas filler in floor of bed on my 48 p/u? I have a steel plate which was fastened to the floor and nothing else.

I looked in Crosley parts book--It calls for (seal-filler neck to floor plate-rubber) it's almost the same as the top--but smaller part #206797 is used on top & bottom on some models.