Hook-ups is still around to this day, actually, which I wasn't really expecting: http://hookupsskateboards.com/ (They still seem to like using anime-style art for most of their gear, too.)
So out of curiosity, I started poking around eBay to see if I could find any of the stuff I remembered seeing back in the day, and I realized that a lot of the artwork they used were poorly traced versions of other artist's works, or just blatant art theft (some of them look as if they just copied artwork right out of Japanese magazines they had found or something...which, I guess can be enthusiasm towards their love of the style, but at the same time it's definitely stealing.) It's funny to think that back then, hardly anyone knew what any of this art was from...I don't think any company could get away with that now. (At least, not on the same scale they were at the time!)
I snagged a few images from eBay and decided to post some here that I found, along with the art that it was "inspired by" for comparison, just for fun.


From Battle Angel Alita:





From Burn Up/Burn Up W:





From Bubblegum Crisis:



From Gatchaman:





From X (X/1999):





From Darkstalkers:





From Iria:Zeiram The Animation:


From Iczer:



From Devil Hunter Yohko:



From Battle Arena Toshinden:



From Samurai Showdown:



From artist "U-jin":




This looks to be a mix of Gundam and Galaxy Fraulein Yuna?:




And my personal favorite...mixing Ranma 1/2 with Marmalade Boy & a bad drawing of the head of the company:



I have loads more but I figured this would be good for a start, heh. XD