I've always been jealous of the necromancer ability to learn FA and skinning on literally every creature.

In modern DR guild based feats like this are quite rare. Most of the time, it's either skillset based, or the guild gets a ++ version.

I'd really love to get access to a lower version of it. Some skinning and/or search option where you sacrifice something to gain FA and/or the ability to 'skin' no-skinnable enemies.

Like skin analyze swain. You forgo the loot and instead do a quick autopsy. While this sounds silly, a 'quick autopsy' is no more or less ridiculous than field skinning a deer while 4 others pound on your head.