Hi Evan,
I'm sure you read the forum rules

, so you know that we don't encourage the sharing of files in lossy formats like mp3 unless there's no lossless version known. Did you download the shows in FLAC format? Why don't you convert the files to mp3 by yourself then? There's free software to do that, and it doesn't take much time.
By sharing recordings in a lossy file format – especially if they're shared over the internet for the first time ever, like many of the recordings here – we risk that they lose their quality. Copying, burning, then ripping and reencoding will destroy the files little by little. We should take care of the files to keep the sound quality.
Of course you can use them in any file format you like, if you keep them for yourself. But please don't spread mp3 versions of originally lossless files!
So if you have something you want to share and it's only in mp3, please post what it is before you upload, maybe we can replace your copy with a lossless version.