Your post reminded me that I had made my own a while back, but both things I used have since broke. There were some more ideas posted to the thread I started about mine.
another user here, jockeys, did a post a while back about a redneck scuttle that cost him almost nothing. i think if you do a search you should find his post and where he got it from.
the other option is to have a look at the moss, dirtybird, and others, and work out what you want and take to a local potter. from my experience, they will usually knock you up something pretty good in the price range you are looking at (you need to have done most of the work in terms of measurements etc, or at least be pretty clear with them about what you want).
I have a "ghetto scuttle" consisting of a deep heavy ceramic bowl, and a larger less deep plastic bowl. I also have a hot water boiler I picked up for a mere $3.00 at the local Goodwill.
I use the water boiler to bring water to a boil, and then poor some piping hot water into the ceramic bowl. I then rest the plastic bowl on top. This keeps the lather really hot: too hot actually, as the lather begins to break down into bubbles from the heat.
I have been experimenting the last few days trying to find the appropriate mix of boiling water, and hot tap water, so the lather doesn't break down.
Does it look as pretty on my counter-top as an actual scuttle? Nope, but it performs the exact same job, and just as well for around $5.00.
Those self watering ceramic flower pots are all over ebay for anyone who can't find them in a gardening center. Just do a search for "violet pot" if anyone is interested. Some of them are pretty darn nifty looking.
Only problem is by the time you pay the shipping fee that most sellers are charging you could probably buy a real scuttle.