[captainclock1988]

Well the 35B5 wants ~14,000 ohms on its plate, and the speaker on this radio is a 3.2 ohm speaker, this is a single ended output setup (only one output tube as opposed to two if it were a Push-Pull setup). 

So the 3rd, 5th or 6th option will probably be the best, because because they're all SE output transformers that can take about 14,000 ohms plate resistance and they're under $50 including shipping costs.