Go to your local shop, if they are anything above $0.80, then look online. I know KnuKonceptz has some for $1.75, but my local shop sells them for $0.65
Upgrade that 4g to 1/0, and there should be some good grounds anywhere behind plastic panels or what not. Just be sure to shave all the paint off the grounding location. Metal to metal is best
Definately, i learned my lesson. and $2 for 4g ring terminals?! ouch! i bought 0g when i bought the wire and they were $0.65. Not too bad for shop price.