You can go with one of Martini/Hagn rifles and I think Brockman in Idaho was making one.

Martini's work is first rate and Brockman's only so so but definitely better than a Ruger or Browning.

http://www.martiniandhagngunmakers.com/projects.htm

http://www.brockmansrifles.com/immediate_sale.asp

I don't see the single shot on the page but he had one at SCI.

Personally I prefer the break action single shots made in Europe.