TM4C129ENCPDT: XOSC vs External OSC clocks

Hi,

We have two external clocks connected one is XOSC 32kHz and another is OSC 25MHz.  The CPU main clock is derived from OSC 25MHz and running a FreeRTOS based system. The Hibernate module is not required and hence not active nor I am using and RTC.

I have following questions;

1. XOSC is 32kHz with Part number CMR200T-32.768KDZY-UT. Unfortunately this is not available anywhere. If you could suggest any alternative and reliable source.
2. I am not sure if we even need this oscillator with the description I mentioned above. Please comment if the system will still work if this component is not installed ?

Thanks