It can be a challenge to find a cycling shoe wide enough to accommodate a bunion. A patient came in today with Specialized© Expert Road cycling shoe, which has mesh in the forefoot, making it not only lightweight but ideal for a bunion as well.
This shoe runs wide, but if you still need a little more forefoot room you can always remove the leather overlying the mesh, since this is simply stitched on.
This shoe will also accommodate an orthotic. $200 suggested retail. There is a entry-level version, Comp Road, at $150; and a higher end version, Pro Road, at $285.
Dr. Jenny Sanders Shoe Blog 
I don’t have bunions but I am in the business of finding the latest and greatest. This is definitely a problem for people with bunions. It is awesome that you looked into that.