To the OP. One of the reasons that not many have provided part numbers is there are *loads* of switcher IC's with an internal switch - so they just require inductor, diode, input/output caps and feedback networks. This is both a good thing - more choice - and a bad thing - its surprisingly hard to narrow down the search to a few parts. Manufacturers often have parametric searches available for things like max input voltage, min input voltage, output current, switching frequency etc.. but again, I have found with these I still get 200+ results. Often we narrow the search further with things like - IC package, cost and extra features.
As this is just for educational purposes, I would just use whatever you can easily get hold of. If it doesn't work very well (cant' reach output voltage, or output current) then you can debug, and try something else. If you have already done your calculations for that particular device you mentioned, then I would say just buy it, and tinker. If you have access to an oscilloscope it will help a great deal in debugging (seeing the inductor current, and the output ripple). If not, it might be a case of build-it-and-see.