WTB: 26" Size Small for grom

Hey,

Looking for a size Small hardtail (or light full suspension) 26" bike for my 9yo. His younger sister and brother will be inheriting this bike when he's done so I'm looking for something that can be upgraded in the future (i.e. not really interested in 1 1/4" straight head tubes). This probably goes without saying but I'm looking to get something really lightweight to encourage more riding. Wanted to get this out there as the season is getting closer to an end in case anybody will have a bike available in the upcoming months.

Thanks!

Seth