You should have left a long, long time ago. Moron musicians aren't worth the time and hassle. He'll be playing in the bedroom for the rest of his days whilst you will find another band and be out there gigging.
Can you say ten year bump?
It's sad that a decade has passed and SIT strings are still extremely hard to come by in the UK.
Bass Direct is the only place that sells them.
Even then, they don't sell Rock Brights or my current strings, Foundations.
A booster pedal of some kind is always worth it in a one guitar band.
The TC Spark Booster is a good shout.
I used that for a few years but have just moved to an Xotic RC Bass Booster which is a great pedal.
You wouldn't have thought there was all this great new music in rock and metal judging by the bands nominated for the Grammys...
Foo Fighters nominated yet again? Zzzz.