//▽AmazonURL短縮
<rx2>(tp://www\.amazon\.(ca|co\.jp|co\.uk|com|de|fr)/)([^/]*/dp|exec/obidos/ASIN|gp/offer-listing|gp/product)(/B00[\dA-Z]{7}|/\d{10})[^<]*[TAB]$1dp$4/<font color=gray>[AmazonURL]</font>[TAB]msg

これでおｋ？