First question, do you need the mp3 of the tones to send them to someone else or for yourself?
2nd question, do you have a CDM and if so, what model? If you have a CDM1250 or 1550, you can navigate through the menu on the front panel (if enabled in the CPS) and select the different tones yourself. I believe it's under Call Alert Tones, and I believe there are 7 to choose from.
Do you just want someone to shoot a video of a radio while it's receiving say a MDC sel call, or do you want a cleaner recording with an audio interface hooked up to the accessory connector output?
It might be easier to generate these yourself with say Audacity's tone generator to the same frequency and timing as the real deal, if you're trying to set this up for a phone ringtone or IP dispatch console or something.