The GP2Y0A60SZ0F sensor is now available. Digikey has about 1500 of them. See http://www.digikey.com/product-search/en?mpart=GP2Y0A60SZ0F
I attach datasheet here.
I also suggest to carry GP2Y0D340K - a popular compact 40cm digital sensor. It is somewhat noisy, so a clever carrying board would help.
Interestingly, Sharp’s current catalogue does not list these two sensors any longer. Are they not in demand in other applications or they are preparing to introduce something new?