Atwater Kent 55c

I just got in a Atwater Kent 55c in on a trade for fixing a old amp. I have absolutely no idea about the radio as far as cabinet,value or fixing it as of yet. Here is the info on it. As far as the chassis it looks great. There is minimal to no rust. It looks like it would clean up. The negatives, no case,no speaker and a few tubes missing. It needs a ux280 and a couple of 245 tubes. It has the rest of the tubes. For some reason I was thinking double digit tubes could be substituted for triple digit tubes, is this correct? In other words I could use a 80 for the 280 and a 45 for the 245 tubes. If so I already have a 80 ad one 45.

The case does not bother me that much as I could make a new case. The speaker is a conccern. Does this take a special made speaker or can a speaker or horn be used on it? Also on the tubes I didn't take the time to see if I had them. Are these tubes hard to find? Most of the radios I have are 1930 or later. So does it have any value to keep or is it a boat anchor? With the speaker and the three tubes missing would this be better to trade on ? I really would like to fix it if the speaker and tubes are not to hard to get. I don't have any atwater kents or any TRF radios and I would like to have one that works. Any thoughts on it.