I would do a simple flushmount drum light. Something like this...

Overhead lights are not that noticeable in bathrooms. If you match the fixture and shade colors you should be able to use any simple shade. However, after checking one store I found THIS which looks to be a match. Still, it may be too large for a bath, so THIS fixture would probably work better.

I like the one HIWE posted because I don't like to see light bulbs. Also, it is more up to date. I would also probably select a different light bar.

Oneida 2-Light Bath Bar · More Info

Pretty lights. Yes, I would try to match the glass and nickle...but I think an unexpected piece adds more interest than trying to be too matchy matchy. I like the simple drum idea home interiors with ease has but no linen shade...not for a bathroom unless this is just a powder room.