Do you have the Motorola Phone tools PC software? You can link your Razr to your PC, copy the ringtones you want down to your PC. Then you can link your BB to the PC and copy them over with the Desktop Manager's media manager.
A little complicated, but if you can't use bluetooth to do it thats the only way I can think of.
Unfortunately it is a locked ringtone so you can't send it through bluetooth. There are software however if you have the while (Which I assume you do since you have a Pearl) that you would be able to upload it onto your computer and then be able to put it onto your Pearl. Try to find a program called P2kman or P2k Commander, I used to do mods for my Razr all the time doing themes and stuff so it does work. Just install the driver and it should connect.
Very happy with my BlackBerry Pearl 8100 !