This CD by the Antares quartet is slightly more affordable.

This page can help finding available recordings. This page also lists the following recordings of Op. 14:

• Quatuor Apollon, Avenira, 2005.
• Joachim Quartet, Koch Schwann 1996 (available on fnac).
• Quatuor Les Adieux, Auvidis Valois, 1996 (available on amazon DE and on kobuz).
• Quatuor Atlantis, Assai, M 2004 (available on Amazon France).

I hope this helps. Best of luck with this wonderful project!