Discovered that it is White Mountains. Only one rosarian carries it. A white rambler.
I don't have answer for your question, but I think I have a similar rose -- here's where I posted it -- http://forums.gardenweb.com/forums/load/rosesname/msg0417321629186.html?3
White Cecile Bruner does look promising as a choice -- I noticed you have some pink tinge -- mine recently put out 1 pink bloom for the first time.
While that rose is similar to cecile brunner, my roses by that name are alot smaller than that. They are almost a miniature size rose on a climbing cane.
I agree about the Brunner. I'm pretty sure it is White Mountains. Thanks!