Oh, dear, I missed seeing Thiruvasakan Paramasivan's post back in 2007. Sorry about that! Well, Thiru, if you're still following this thread, I just took a peek at Ebay and, lo and behold, there is a taishogoto for sale right now! The listing includes several pictures, in case anyone wants to go look at them. Here's the URL:

http://cgi.ebay.com/JAPANESE-VINTAGE-PEACOCK-TAISHOGOTO-AUTOHARP-STRING-NR_W0QQitemZ290336393301QQcmdZViewItemQQptZAsian_Antiques?hash=item439965c855&_trksid=p3286.c0.m14