UCC2808-1: LTspice file for UCC2808-1and TPS2812D

Tool/software:

Hello,

I'm looking for the LTspice files for the components UCC2808-1D and TPS2812D, it can be a .lib or .cir file. I'd like to simulate a DC/DC 'push-pull' converter, from 18-50 to 28V (300W). 

Thanks in advance