ScorcherIV,
A cruising chute is an Asymmetrical cut/shape and a Spinnaker is Symmetrical. So when you are searching look for Cruising Chutes or Asymmetrical spinnakers. The asymmetrical is designed to fly like a large loose jib, with distinctive clew and tack. The symmetrical spinnaker is symmetrical and the clews and tacks are interchangeable. Having said that a symmetrical spinnaker can be rigged and gybed like an asymmetrical spinnaker, it just will not set as nicely.
As SYJetzt said you will need more equipment if intending to rig for a symmetrical spinnaker; spinnaker pole to control the tack (with uphaul and down haul), each clew will generally have a sheet and brace attached. The brace is used on the tack (windward corner of the sail) and is lead through the pole and a block near the middle of the boat and can be sheeted to the primary winch. The sheet s used on the clew (leeward corner of the sail) and is lead to a block near the transom and can be sheeted to a halyard winch on the cabin top.
For the asymmetrical set up, the tack is connected to the bow of the boat by a strop. This can be from the headstem fitting or from a short bowsprit. The two sheets are both connected to the clew. The lazy sheet is lead outside the forestay and can be inside or outside the asymmetrical tack.
The Asymmetrical set up is much easier to handle as there is no pole to juggle.
For sail size the luff length is going to be the critical dimension, and will generally be longer than the distance between the spinnaker halyard entry and the bow.
Cheers
