Hi Barbara, I have a few thoughts, that, may help you if you haven't by now found what you were looking for in 2003 post.
1) If you haven't try posting on the Switzerland message boards. 2) I know for a fact there were/are Tuffli's in the Montana/Wisconsin area's, why not post on them too.
My uncle was a Tuffli(uncle by marriage). His parents Hans Tuffli and Katy Joos. Hans was born in Switzerland. Kate in Wisconscin, but Kate's parents Martin Joos and Magdaleana Arms were both born in Switzerland. Hans and Kate settled in ND(try posting there too)and had several children and then moved to Oregon had several more children before returning to WI.
Good luck. Let me know if I can help further.
Nsambradley@aol.comBarbara