I checked and this is what I found : the number is LAS-1 it is an ACME actuator 12 Volts and the normal actuation is 86 KGs (stall is 120 Kgs) . Throw should be 3 inches (mine was 6 inches - too much travel for nothing). Look at Firgelli Automations for a suitable replacement. They have a variety that you can choose from.
I haven't tried mine in real flight situation - Plane still under contruction.
The plans for the VG's came from one of the Zenith Newletters. I think the article was written by Michael Mossman. I can't find my copy so I can't verify that for sure. They are really easy to make out of scrap aluminum. I'll try to describe the process so you can make them. I cut a strip of .025al 35mm wide. Cut a bunch of blanks that are 85mm x 60 mm. Then just bend up 10 mm on both ends. You can use a sander to round the corners. The finished piece will be about 65mm x 40mm x 35mm and stand 10 mm tall. Look at my picture. I put 4 of these on either side of the Horizontal Tail.
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