For the track My choice would have to be the HL tiger1 track which measures 1.75 which, would be wider, but if I clip off the little tab on the one side it would come out at 1.625" so .025" over would probably be close enough, as the real track scales out at 1.6"
Here is a scan of the HL 1/16th scale tiger1 track un-altered

Here is a pic of the proposed trimming of the track. The first 3 white lines is one option the second 3 lines is another option.

What do you think? It's about as close as I'm going to get