If it was my bike I'd fix it but I'm a little anal about things like that. I'm thinking it's about a 30 minute job.
1. Measure the bike and the hub. You've already done that.
2. How's the axle length? You need a little axle sticking past both lock nuts. Ideally I'd replace the axle with one 5mm longer.
3. Reassemble the hub with a 5mm spacer on the non-drive side.
4. Redish the wheel to center the rim between the locknuts.