Before anyone says "why?", I did this for troubleshooting and I'm just passing this along as an option for anyone who might be having vtec problems.
About six months ago, I started having a knock from my car, and after changing out the rods, pistons and intake manifold (for a non-Intake Air Bypass model), my buddy and I decided to start looking into the head. Without any real guage for replacing the lost motion assemblies, we decided to eliminate them from the engine. To do this we had to take out the third follower arm, and the vtec piston in the other arm. We went ahead and used an -8 AN B-nut, hollowed out .682" with the threads filed down, and shaved to fit between the two other followers with roughly .003" on either side. After installing them in place of the third follower arms, and firing the engine up, they worked great. There wasn't any excess rattling coming from them, they provided adequate lubrication during the 10-minute run, and the only trouble was an engine code for vtec system pressure (which was we figured would trip). Fortunately and unfortunately, the head wasn't the cause of the knocking... a conclusion we came to after syncing a timing light up with the sound. If you do suspect a lost motion assembly, worn vtec engage piston, or worn third follower (they have a pretty small leg that rides against the solenoid), this might help you out though.

Head Pictures