Had a hard time finding 46 plate as well. Saw the same one you mentioned, same opinion, no thanks. Had just about decided to buy a set of 48 plates and do a little modifying of the 8 into a 6. Got very lucky, very lucky, and found a 46 that appears to have never been used and in near mint condition for $50 on eBay.
Then you'll have to wrangle with the tax office to convince them 45 and 46 only issued one plate.
Keep looking and googling.
'69 1/2T stepside, Sea Foam Green, 250 L6 w/ 3 on the tree, not an option on it, in the family since new.
