goose
Drew, Shamus has had one for several years. They are quite simple to make, or bash. HAS to be simple or I wouldn't have been able to do it. To my knowledge, there is no real kit. I don't remember the brand ( it is well known ) but it was a boxcar kit, with instructions on how to modify to a Galloping Goose. First of all it looked pretty pathetic. Secondly it was an unpowered dummy.
Find an old HO size car or bus. Sometimes Hot Wheels has a Model A or T, an old Duesenberg, anything with that type front end. N scale wheels with a longer axle on the front. Use a cheap little diesel switcher motor and drive wheels for power and locate it into a small old-timey passenger car, which you have fastened onto the back of the car you are using the front of. A little imagination, and a mite of bashing, and voila!!!!
I have two I made, and if you are truly interested, email me and I can send pics. I don't know how to on the forum, but I can send email. The geese will break down to show how I put together.
Lynn