Looks like all the stuff at tegaki.pipa.jp/IDHERE and pipa.jp/tegaki/IDHERE and pipa.jp/tegaki/VBlogList.jsp?ID=IDHERE/ are now all just tegaki.com/IDHERE, if anyone good at github backend or mass updating via bot wants to unify all those URLs.
one of these days i'll figure out how to make shitty python code to mess with danbooru's API and update all those URL edge cases that danbooru doesn't normalize that bother me, like the twitch.tv URLs and the lit.link/en prefix. one day.