I don't know anyone really that performs the service...most people just do it themselves. Its not very hard to do at all, very little soldering. I'll ask around and see if I can find someone that will though if your interested.
actually... don't we have a tec doc on neogoecd.net for that?
yeah... here it is.
http://www.egameaddiction.com/neogeocd/techdocs/sai/languagemodbysai.html
I am thinking of performing this service later... I Was going to start 6 months ago... but I was talked out of it from a guy when we were discussing it.
Mainly because of my liability if I accidentally "ruin" a system....
I might still do this in the future though as its not too hard.