SLP offers them for the Series II. I don't know about the one you have...check it out in "GM High Tech Performnce Magazine." I think they added 20 hp. Good Luck!!
You might want to e-mail them and ask who carries rockers for a 3800 Series 1 engine. They are very helpful. You also can try www.club-gp.com and post this question on their site.
