Great topic. I have 2 Philco antique radio's. I have a Philco Model 40-180 Console very similar to yours and a Philco model 610 tombstone model. Both work beutifully.
Even though you have a Montgomery Wards, there are several web sites that have a lot of information on parts for antique radio's.
WWW.philcorepairbench.com is a great website and has good sources for tubes and stuff.
This might be a good starting point for your research.
Also, you might want to consider buying a small AM Transmitter kit. I use that to listen to Old Time radio shows on my Antique radio. It comes with RCA jacks that will hook onto your stereo, computer, boom box, or whatever and transmits your MP3 files to your radio. Brings a whole new dimension to the world of old time radio.
Enjoy your radio. This is one of my favorite hobbies.