Used 1954 truck fenders are often a little more expensive than the 47-53 fenders.

That is not a negative statement, just reality. Nonetheless, used 1954 fenders show up pretty regularly on eBay and in the Swap Meet. Finding good, used, inexpensive 54/55 grill parts is a worse challenge. Once again, this is not a negative, just reality.

This situation is reality smacking you in the face. Grit your teeth, and approach this situation one step at a time.