I found on a previous post on this site a place in LA called Jeff's Gourmet that has several interesting sausages, including smoked chicken apple and chicken cilantro, among others. Anybody know of places in Brooklyn, Manhatten, even the 5 Towns, that has something like this? (We keep a strictly kosher home, so while I know this board isn't about what is kosher, we need a reliable hechsher).
Neshama sells a decidedly more limited variety of sausages at retail markets -- some are turkey/chicken but they also have a decent glatt merguez sausage. Neshama's chicken/apple is very good as are most of thei other varieties. Their web site says they're available at King's, Wegman's and Whole Foods on the East Coast.
May not work geographically for you, but:
Woodbury Kosher, in Hicksville (on the Plainview border - next door to Bagel Boss) has delicious homemade sausage. i've only had the hot kind. I assume it's beef, but haven't asked. I also don't know what other varieties they have -- I tried the hot sausage once and since then always need to have a package in my freezer.
Woodbury Kosher Meats & Catering
428 S Oyster Bay Rd, Hicksville, NY