I was curious what contractors are doing when dealing with this situation. I have not dealt with this in many years, during that time we basically used something similar to window screen and made like a basket over and around the can to maintain required clearances, what is your method. The cans specified are non-ic we checked on ic rated and the price was way out of line.
In the past, every contractor I've worked for has used something similar to what you've described, "chicken wire" or the like to keep the insulation away from Non-IC rated recessed fixtures installed where insulation may encroach upon them. What has changed over the years, and where some confusion appears to be, is the requirement for "air-tight" fixtures.
Here in FL and elsewhere in the US, the building code (or energy code) states that any penetration between conditioned and non-conditioned spaces needs to be effectively sealed to the original building envelop rating.
Almost every airtight fixture I've used is also IC rated. However, in the case of ceiling speakers, or IC/airtight fixtures being to pricey or not available, you do have an option. You can frame around the fixture and install ceiling material (the same thickness drywall or whatever is being used) to the framing, and then install your fixture. This satisfies the fire rating, air movement, and clearance around the fixture requirements, and allows insulation to be wrapped around the box maintaining the "R" rating of the ceiling.
Since we are not the most efficient framers or drywall installers, we usually work something out with the contractor who is doing the framing/drywall work on site so that the additional cost to us is minimal.