a few of my fellow players have been asking for these things. I can can think of all sorts of evil ideas for using these. Anyone seen a write up for them anywhere?

Would be like a concussion missile, just with a hit allowing the deployment of a droid on target (additional droids with advantage)

They'd just be a basic minion droid. Likely 2s in Agility, Int, cun, 1s the rest with skills in stealth, mechanics, and melee. Equipment is toolkit, utility saw (counts as vibroblade).

Perhaps a low damage missile, say 4 damage, but with the Burn 1 or 2 quality. Maybe a couple ranks of Vicious to represent the damage the droids can cause to various systems.