Learn how to "tucka-tucka-tucka" properly and you can gobble on just about any tube with a reed in it.
I took my kids to an outdoors show a few weeks ago and they all got a free duck call from a booth.
I can gobble on those duck calls better than anything I've ever heard come from a Haint.
I use the wooden Haint with a "tucka" sound too.
Tim Grounds "gobbling thunder" sounds good, but it is VERY hard to blow and control.