Are there any mods which make my bad-ass middle-aged bearded character look less like a prettyboy, perhaps enableing the fiend race for play? And any mods that allow you to change your race/hair/etc. without messing up your perks?
Playable Raider/Fiend races:
http://www.newvegasnexus.com/downloads/file.php?id=35352 <---- nevermind this one
http://www.newvegasnexus.com/downloads/file.php?id=41395
New Vegas Redesigned did a great job of making older characters all wrinkled up. It's still available on a French site http://www.jeuxvideopc.com/downloads/44462-fallout-new-vegas/1265-character-design/details-30949.php. The first link that says "Telecharger" is what you click to download.
Use
showplasticsurgeonmenu to change your face and
showbarbermenu to safely change your hair. There's not any way to change your race without breaking your perks so you'll have to add those back in through the console.
EDIT: Just noticed Raider race was removed from the Lings file that's currently posted.