"Other than repros?" I don't understand your 
title? 
Where have you seen repros?
Good Gunnm cels are very rare, very expensive, 
and very hard to find. Most have made their way 
into collectors hands. Ocassionally they pop up 
every now and then on an auction site or online 
via private collectors sales and sometimes 
dealers pages. But that is usually just "one" 
maybe "two"cels at a time. Gunnm fans are a 
very "dedicated collective". It might help to 
contact those collectors personally. It is better 
in my estimation.
Lately, I have seen more sales posted than last 
year. But I am talking around once a month or 
every two months, or so combined, and the prices 
have ranged from $850-$3,000 (Alita cels). You 
can get great deals on Yugo. I know one collector 
that bought a very nice one of him for just $50. 

Also, the LD album "repro" cel of Alita (Gally)I 
have seen online.