If you see a Gravi repro cel of Shuichi and his 
hair is reddish-brown, not pink and he's wearing 
orange and green tanktops -- that's indeed an 
OVA repro. There's at least three I can think of 
for Shuichi. 

You can see one at Usagi's House: http://usagis-
house.net/mcart/index.cgi?code=3&cat=92