there is a group of belgian double rifle's, made in the last century for the local market to hunt wild boar's. you will find them most time's in 8x60RS, 9x57R, 35WIN and 405 WIN.
with a little bit of patience you can find such a double rifle!
look around in europe and special in belgium, they exist. I remember an article in an older gun magazin about such a belgian DR in 35 Win and will try to find it and post it for you.