Twrp help :(

I have a g800f rooted
I need to install the twrp 2.8.0.0 bootloader recovery without a pc. I have the tar.md5 file but I need the twrp .img file for this phone..where can I get the twrp.img file for this phone?
it will help me out a lot .
I’d appreciate the help. I’ve Google but I only find the tar file. which I got from the cyan gen mod cm12