Jim, i purchased mine at Volks Cafe in Santa Cruz.  (www.volkscafe.com).
It is a really great fit.  I too have round headlights, but the bras
that i've seen all seem to have square cut-outs that are screened over
that go from the outside of the light, across the whole front (radiator
intake esp.) and then square up again on the outside of the other light.

hope this helps.
cheers
Matthew

Matthew Pollard          "Racing with the wind and flirting with death
Dept. Of Chemistry        So have a cup of coffee and catch your breath"
University of Idaho
www.uidaho.edu/~poll7356