I have started backing up Tumblr blogs that are tagged with TG. (Keep in mind some of these might be feminization shit. Since I don't use Tumblr I haven't even looked at most of the blogs I'm saving, but I'm saving them so I can do that after Tumblr bans porn right before Christmas. These are western TG:
http://www.mediafire.com/folder/fj7fdz5qmvyz7/Tumblr_backup_of_TG_captions
Atomicstgtf
boddyhoppernebula
dannyellestgblog
femslut21
iwishiwereidubbz
katstgtfcaptions
mentalcrashart (mentalcrash)
mindyzz00
rachelthedreamer
Rauk22
Venessatgcaptions
http://www.mediafire.com/file/q33k13p9ccp4358/stormfries.zip
Stormfries' tumblr (15 GB)