I did a web search for RingTones and found several sites that offer them... unfortunately NONE of them would work with MY brand/model of cell phone.
So what I did, was play my favourite sound on my PC and record it into the phone and use that. Just have to be quiet when doing it or sniffles, burps and chatty people in the background get added to it.
The crossing whistle would be nice for a ring tone but it needs to be amplified quite a bit to be heard on a cell phone. I used Audacity to cut of the silent sections at each end and upped the volume quite a bit without clipping the audio.