My location is Salt Lake City. I will see If I can make another connection for you. It is likely that we should be able to get something. When our ancestsry comes directly from Canton Bern where the family seat at Adelboden ( south up the mountains from Lake Geneva(Lac Leman on some maps) it gets tougher. No microfilming of Bern records has been done.
However, there are some Allenbachs who came into Canton Vaud and an extensive collection of records are available on microfilm. When I have an opportunity will check some of these and see if I can find the family.
Another source is the shipping lists of boats that carried immigrants to US ports.
Let me know when you get something and I will also reply.