We have 2 units of the Crystal 32kHz in stock at our Sydney warehouse.
We can get a further 21 units from SparkFun Australia.
If you order today we can dispatch this stock between Tuesday, Apr 23 and Friday, Apr 26 2019.
SparkFun's Description of the Crystal 32kHz
Standard ‘Watch’ or Real-Time-Clock crystal. 32.768kHz means it is precisely half of a 16-bit counter. Start counting at 0x8000 (or 32768). When the counter rolls over from 65535 to 0, then you know that exactly one second has passed. Reset the interrupt, reset the counter, and start counting again! Rated at 12.5pF load capacitance, 35K ohm max (18K ohm typical) series resistance, and +/- 20ppm stability. Small cylinder package.