My sister lives in Torrance, so I will ask her for a recommendation (doubt it would be VW specific though).Maybe member ylwagon knows something. He's not to far away from your neck of the woods
Correct. An air fitting adapter screws into the spark plug hole and a constant supply of air pressure holds the valves. It can be done, no doubt. But those valve stem keepers make me nervous.From what I've read, an air line can be attached to the spark plug hole, on the compression stroke, which will hold the valves closed while the spring retainer is removed.