Sangean seems to have a couple shower radios. The Sangean H201 is all white, looks like the Sangean PRD7 -- the radio almost looks like it's in the same case. I don't know if it has the same circuitry inside, but the PRD7 is a pretty good AM band performer from what I've read on the internet. My guess is the H201 has similar guts inside. It possibly would bring in a lot more signals than the radio you have now.
It runs on 2 D cells.
H201 : FM / AM<br>PLL Digital Tuning Waterproof Radio
The H201 is advertised here as having a good AM and FM section.
FRYS.com*|*SANGEAN
Sangean makes pretty good radios, so it's possible the advertisment is not just talking hot air. I have several Sangean radios, and can vouch for their performance capabilities.
PS: remember, you want to have your radio aimed in the right direction to get an AM station at full strength. AM reception is almost always directional, even on a good radio. Turn the radio one way, even a local station can often weaken in strength. Turn it the other, and the station can come in better. I'd give that a try before investing in another radio. But if you're going to get a new radio, I'd at least look at the Sangean.