There are many good stim free preworkouts. I would recommend one with nootropics to give a little boost without any strong stimulants...
Innovapharm Novapump Neuro
SuperHuman Pump
Here are two that look good but I haven't used so if you do please post your findings in this thread...
Conteh Sports- Mega Pump
Supplement Needs Pre Pump+
The Innovapharm Novapump Neuro and SuperHuman Pump look awesome. The other two you haven't used yet seem to be sold only in the UK.