I think persimilis mites might
.. I had success using them to get rid of spider mites about a year ago... I didn't have full on webs yet, but I had spotted spider mites as far up as the sugar leaves on the top colas. it was prob like week 5 or so of 8 by the time I noticed them (on a few hard to reach plants in the back corner), so there was resin coating all the buds and leaves already.. anyway, I released phytoseiulus persimilis mites twice a few days apart and couldn't find any spider mites anywhere by week 7 or so... there were no persimilis on the buds or upper sugar leaves by that time either, but they must have gone up there and eaten everything because all the spider mites and eggs I had seen previously were gone... the really cool thing is I haven't reapplied since and I still find them (persimilis, the good guys) on the very bottom leaves sometimes when I harvest, so they're still around doing preventative maintenance almost a year later... I'll probably release another small batch soon anyway though, just to keep the population up...
I'm interested in these too... I would worry they would eat beneficial mites too though since they're a larger probably more generalist predator... I use hypoaspis for fungus gnats and thrips and persimilis for spider mites so I wouldn't want to introduce anything that was going to eat those guys...