Like some of you out there, I'm a bit of a 'wide-body' and found the stock CB-1 mirrors to be pretty useless. Same problem with my GB500, only it was even worse! I fitted small bar-ends to my GB but the CB-1 has its bars a little further back and I wanted something easier to look at.
I've been running a pair of black Honda CT-90/110 stalk mirrors on my '79 CBX since the OEM CBX mirrors are quite expensive and are nearly identical in appearance to the CT mirrors. My CBX has much wider handlebars than the CB-1, so I swapped mirrors to see what would happen. Turns out the CT mirrors work perfectly! They have long, slender stalks that get the mirror out beyond your elbows and rear visibility is great. For you guys who don't want the mirrors to extend beyond the handgrips, you can just swivel the stalks forward enough to get them to fit as you wish. Cost for OEM CT90/110 mirrors is about $18/ea (for black, $18/pair for chrome) from Beatrice Cycle online, or through Ebay. Just be sure to get the ones with the 10mm thread size. Some earlier CT's had an 8mm thread.
Eric
ps I don't have any pics of the mirrors on the CB-1 as yet, but here's a shot of them on my CBX to give you an idea of what they look like.
