I have a pair of new/unused/in original packaging Medela size small (21mm) breast shields/flanges for use with the personal fit connectors. I never opened them because I bought a few different sizes and ended up just needing the original 24mm that came with the PISA

$10 shipped.

They're currently selling on Amazon Prime for $13.66 (see here: http://www.amazon.com/Medela-87072-Personalfit-Small-Shields/dp/B000RZYJDC).