For the cost-conscious regarding the equipment list:
 
Mares Avanti HP Full Foot Fins
 $45 on CanAm, $35 at LeisurePro
 http://www.leisurepro.com/Prod/MRSFAF.html?&&
 
Fin Keepers
 $15 on CanAm, $7 on Amazon with free shipping
 http://www.amazon.com/dp/B001O78GL8/?tag=getfresh-20
 
Neoprene Fin Socks (the ones I have that you like)
 Women's 9.5/Mens 7.5 is size small
 Some options have free shipping with Amazon Prime. Not all. Click until you find the ones that do.
 http://www.amazon.com/dp/B002OWOFIU/?tag=getfresh-20