When you say "short hand" does that mean you have one other competent crew member besides yourself, or just yourself and an inexperienced crew, or are you thinking "single handed"? The reason I ask: managing a symmetrical spinnaker and pole requires a competent, experienced crew on the fore deck. Single handed requires an extremely reliable auto pilot and all the requisite controls in the same area at the mast. Without one or the other I wouldn't mess with it... instead I'd invest in an asymmetrical sail on a roller furling system.... getting rid of the pole altogether.
Launching a symmetrical spinnaker with a pole via a dousing sock can actually be somewhat more complicated than it seems. It's actually easier to hook up the sail while it's in the turtle clipped to the lifelines and hoist directly out of the bag. One less step.. since you don't have to hoist the sock package first, then launch. Taking it down also requires the same extra step.... and you might find a "dousing line" or "take down string" to be more efficient. This is a line attached to the center of the sail that the foredeck crew can use to control the takedown.
Regarding "brand" of dousing sock... they're all pretty much the same... there's a plastic or resin hoop attached to the mouth of a fabric tube that has some lifting tackle sewn inside at the top to raise the cover, exposing the sail. Any sailmaker will fabricate one for you. The ATN is pricey... so look around.. but remember...
What will make this all feasible is not going to be the brand of sock you buy, but on how well you thought out the process and set up the requisite rigging. If you go with an asymmetrical... you only need an adjustable tackline, sheets, halyard, and perhaps a set of twings on the sheets for better sail trim. With a symmetrical you'll need halyard, sheets, no tack line.... but pole handling gear includes a mast connection for inboard end, a topping lift , a fore guy, and a pair of separate after guys (or modify your sheets to multi purpose sheet/guy) Have fun.
