The Suzuki recordings are now available for download from Amazon, and on iTunes. A friend and colleague of mine, Laurie Niles, has created a list of Amazon links to all the available recordings - take a look at her blog post for the links:
Download all the Suzuki Violin Book recordings -- for when you can't find the CD!
Note: For books 1 and 4 especially, please be sure to use the Revised Versions (William Preucil is the recording artist). For book 1, the Preucil recording is the only one containing the triplet "eat ice cream eat cook-ies" Twinkle Variation, and for book 4, the Preucil recording has a piece of music, Böhm's Perpetual Motion from his Little Suite 6, which the other recordings lack.
It's not a bad idea for book 1 students to listen to book 4 recordings to give you an idea of where you're headed in the not-too-distant future!
"Have the child listen daily to the recording of the pieces he is studying -- the more frequently the better ... Listen and practice -- through this approach, children will certainly grow. Then every child will make smooth and rapid progress. You already know from observing your own that children make smooth and proper progress in Japanese [or their own native language] which they learn by listening. ... If ... without even letting the child listen to the records, you try to get him started by saying 'Now, let's practice', the child has no desire, no incentive. There is no way he can make smooth progress." - Shinichi Suzuki (International Suzuki Journal, 1994).