I had an "Aircastle" eight-band portable radio about 20-25 years ago, which had basically the same features and frequency coverage as the National Panasonic RF-5000 under discussion here. (It weighed--well, not a ton, but with batteries it weighed perhaps five pounds or so.) My set was a trash-day find; I wish I would have held on to it. Oh well, my Zenith Royal 1000 has almost everything (except FM and the tuning/battery meter) the Aircastle portable had, so I guess it all worked out for the best. Two advantages the TO portable has over the Aircastle set is that the former is hand-wired on a metal chassis with socketed transistors (typical 1940s-'60s Zenith), whereas the latter was built almost entirely on a large PC board. The Aircastle portable also had red indicators on the slide-rule dial for each of its eight bands, activated by a spring-loaded switch to conserve battery power. I don't think my set had longwave, though, although it did have two public service bands (30-50 and 152-174 MHz). The bandswitch on my Aircastle portable was an eight-position rotary switch, but then again I think this radio was meant to sell for much less than, say, a Panasonic or certainly any of the Zenith Royal series (1000 to 7000Y) receivers, so sets with names such as Aircastle (not to be confused with the Air Castle sets of the 1930s) would probably be much lower-end than similar portables from major manufacturers--with a price tag to match. I don't think the original owner of my Aircastle portable paid more than $20-$30 for that set when it was new.
BTW, I like how MrFixer connected the two broken FM antennas together on his RF-5000. If he ever wants to replace both antennas, I'm sure new ones can be found, but I'm not sure where anymore. Radio Shack used to have these, but since they are almost entirely into computers and wide-screen high-definition televisions these days, I don't think they have much in the way of replacement parts.
If RS doesn't have these antennas, I'd look for a junked portable similar to the RF-5000 and use the antennas from that set. This way he would also have a source for parts, should something break or become defective in his operating set. These radios being as old as they are (the National Panasonic set under discussion here is from 1968 or so, as Sandy mentioned), it could be quite difficult to find parts for them these days, so having a spare non-operational set around just for parts is a good way to keep these great old sets going.