I found these Fisher pipe adapters on ebay..just encase someone needs this type of adapter..
http://www.ebay.com/itm/6-to-7-5-8-...342?pt=LH_DefaultDomain_0&hash=item2a28830806
I'm in the process of converting my fisher insert to accept a stainless liner also..
http://www.ebay.com/itm/6-to-7-5-8-...342?pt=LH_DefaultDomain_0&hash=item2a28830806
I'm in the process of converting my fisher insert to accept a stainless liner also..