I'm just an editor, so my advice is only about how to organize your question -- unfortunately, I know NOTHING about your topic! I hope that disclaimer protects me from flamers...
For these guys to help you, you need to back up a bit:
1.) What physical format does the organization receiving the samples REQUIRE? (e.g., "red book" (commerical-style) compact disc, cassette tape, "master" tape or disc at higher-than-red-book quality, Minidisc, etc.)
2.) Do they REQUIRE electronic submission (hence MP3)? (i.e., do they say, "we accept submissions only by email in the mp3 format"?)
3.) If they want red book CDs (CDs that play in a normal CD player), why not just find someone in Vancouver or your home town to selectively copy tracks from your master to a fresh CDR? Almost anybody can do that for you for next to nothing.
4.) If your samples have to be on CD and have to be a certain number of seconds in length, then have someone make an analog copy to CDR for you. In other words, they play it back as analog information (the music that comes out of your speakers), record the output digitally (meaning their A/D converters put it back into digital format), then copy the resultant file to CD for you. Again, almost anyone already set up could do this for you very easily. Keep things as simple as you can -- use existing resources.
5.) If your samples don't HAVE to be in MP3 format, then don't go there. MP3 is a huge step DOWN from copying your tracks from your master CD to casette tape, for instance. Transfering a master CD-quality file to mp3, emailing to a friend, and having him remaster it to CD is a huge waste of time, money and sound quality.
Get the tracks you needed copied locally in whatever format is required for submission, then FedEx the submission directly. It will be MUCH cheaper and faster.
There may be other factors of which I am totally unaware, and if any of this seems presumptuous or condescending, it's sure not meant that way. You say you're under a deadline, so I'm intentionally pushing you to clarify what you need, so that the guys on this forum who actually UNDERSTAND this stuff can get back to helping you. My tone reflects your urgency, not my lack of patience.

OK?
I sincerely hope some of this helps! I'd love to hear your work some day.
Best wishes,
Mark H.