I would recommend that a shatter wax block be added to /druglab.
This would consist of 9 shatter wax and would create a shatter wax shipment that would be a gold block.
I personally would find this extremely overpowered because just a normal inventory of Shatter Wax is around 200k and by compressing that, it would be so broken.
Shatter wax is $120k (at prison) per inventory and if you compressed to a full inventory of blocks the price would be $1.08mil. Assuming that its a -22% change like wheat to hay-bales it would be $842,400 per inventory. Yes its a lot more but keep in mind that selling to the prison is risky. You have to deal with police aswell as players.