My players built this custom during their last Shadowrun game. I think this needs a build here.
BioBox
Why sneak in when you can be delivered? the biobox was designed for insertion/extraction jobs. The box is sized for one human, two human, troll, or two trolls. The box is led lined, interlaced with biological material prevents assessing, and temperature controlled to prevent thermal scans. While not standard, the box can be upgraded with air tanks as it is air tight, sound dampeners, electrical warfare devices for electronic dampening, and medical equipment for keeping a target unconscious.
Item Cost Restriction
human 2,000 10
two human 3,000 12
troll 3,500 14
two troll 5,000 16
Throat Punch Games 
It is a good idea but I think you are underpricing it considerable. It uses lead, cheap but heavy, active biological material, expensive and difficult to maintain, and a thermal masking system which has to mask the system maintaining the biological masking plus the people inside and the lead will be acting as a heat sink. Not an easy technical fix especially if you are trying to make it look like just another shipping crate.