S-T, Chota Brookies gone. But Piragis bought up the last of them. That's where I got mine. Try Piragis in Ely, or Rutabaga's in Madison, WI. If not, don't worry. I think the NRS wetsocks system I talked about worked great. You'll get water over the top. But you've got enough neoprene to keep you feet warm in cold water and they fit the boots better. I fussed around with both systems before my last trip and liked the NRS wetsocks best. It allowed me to have both insoles in the boot for a thicker insole support for walking across rocks.

Chota 10 = OTB 10

Yes, OTB insoles allow for some sizing. Call them. They're very helpful over the phone. I sometimes go for an 11 so I ordered both a 10 & 11, planning on returning one. But a friend liked the 11, so it worked out great.