[Arran]

I would be inclined to use film caps in that can, I think Panasonic has a series of them available that are not too expensive, though obviously more then equivalent electrolytics. Those values were often used as filter caps in early AC radios, like the model 95 and model 20, and Radiola 18. I'm guessing that the capacitors are used for RF bypasses as almost every set that came with one still has the original can in place.
Regards
Arran