Well there are only 50. My brother has the 49er, Willie's wife the 50er. You're unlikely to get your mitts on either of them.
My brother's does not have the JD cane in it. And as you say, it's all Willie's design.
It's definitely a JD cane in the Bat Cave. I can't make out the Salamander one so well, but it still has the colours of the JD one.
I don't think I'm being remotely cheeky. Just reporting my reaction to a bit of art which, for me, has been completely spoiled. My reaction to art is personal and a gut thing. The colours of the cane spoil it, the shape of the cane is incongruous with the theme - as is the lettering. And it's not even the artist's initials.