Couldn't biofiber (SR4A 264) theoretically be grown into the shape which could be worn?
After growing it over a biodegradable mold or something, it might be possible to harvest it and wear it as a magic armor vest/cloak...
The plant is difficult to maintain even when planted and needs lots of maintenance, so it certainly couldn't live very long when used this way. Maybe degrade 1 rating every hour or so, as well as lowering its rating whenever taking physical or magical damage.
Process, skill and effort required for growth and delicate harvesting procedure as well as an in-built source of nutrient for the plant would mean high availability and put a nice price tag on it.
Note: Not RAW, but explain it to your GM and he might houserule something. It certainly shouldn't be common-place or used very often, but when preparing for a special mission, maybe the GM likes this kind of planning ahead.