Sparked my interest there are 2 on ebay right now used and bunch of new ones.

http://search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&from=R40&dfsp=32&satitle=250+exhaust+manifold+chevy&sacat=-1%26catref%3DC6&fmmk=&fmmd=&fylo=&fyhi=&mppfqy=250+exhaust+manifold+chevy&sargn=-1%26saslc%3D2&sadis=200&fpos=98110&sabfmts=1&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop=32%26fsoo%3D2&coaction=compare&copagenum=1&coentrypage=search