You have a factory wheel, with a proprietary rim, unless you can get another (identical) rim from Vuelta (highly unlikely) if you are that concerned about the braking surface, scrap the wheel, and get a new one.
Cliffords idea to re-use the spokes is nice, but realistically, it's going to be far more effort than it will ever be worth in either time or money terms to even attempt to re-build a proprietary wheel like that. You could possibly re-use the hub, but you would still be looking at a low spoke count wheel, which is generally better left to professional wheel builders/manufactures.
Thinking that if you really want to replace the rim, your need to up your budget to a full wheel.
One thing in your post that doesn't make much sense is the OLD measurement you have quoted, you say it's a cross bike, yet you say it has a 135mm OLD, that sounds wrong, as rim brake hubs for road (and CX) bikes from the mid 90s to today all have a 130mm OLD