How to trigger gear that doesn't have a trigger port (?)

I've been searching for a solution and can't find one - hopefully someone has solved this kind of problem.

I'm using mostly Meridian gear, but this is really a generic problem.  I've got standalone streamer and DAC, and I want to trigger their power to follow the pre/processor. I've found power strips that purport to do this, but when the Meridian pre is powered up, its draw is apparently too low to trigger the power strip; there are a couple of them, out there, that claim they're adjustable, but I'd prefer something like a strip that can take a trigger signal from the Meridian.

I'd like to hear about implementations that could work (before I explore getting someone to build a unit for me); any ideas?

Rich