If you still haven't found any. I will now explain the concept and later will send you a version. The spell will need 2 leggins slot. But it could also use helmet but i assume you want to use it repeatedly so Helmet with detonate sensor wouldn't work well (Casting from CAD or Helmet has same Psi regen cooldown but leggins have 0 Psi regen cooldown)
If you want it can also check whether you are or not full health. Also taking dmg means Psi will not replenish for some time so this spell will probably drain but definitely better than food or natural regen.
One spell bullet will be only for checking. It would spin chamber to the slot with the regen spell.
(Because cost is calculated when you make the spell not dynamic.)
The other would simply have a 5duration 1power regen and spin chamber to get back to check spell which heals instantly 1 half heart.