Then there's this one for about $15 and a little shop time cutting & drilling the bracket that attaches to the tilting steering column:
The cable is a $10 bicycle brake cable + setscrew-attached 'knarp' on the end (like a throttle stop). Other end attaches to the brake like the other DIY suggestions.
When you tilt the steering wheel all the way up it pulls the cable & holds the brake depressed. Stealthy
I also have a hydraulic "line lock" on mine that I installed when new but I prefer the cable because it holds pressure in all 4 calipers and it's obvious when it's applied.