I might be able to do a little tour guiding on the south side of the Montlake bridge. It's my neck o' the woods so I know the back routes/bike routes pretty well.
I checked with Alex at 20/20 - no mixte's right now, but a good selection of step through frames - there's a really awesome hot pink one....... (actually its a his and hers pair, though the "his" frame had some damage that had to be fixed with welding!)