You DON'T Need to go Vintage to get certain sounds. You Can do a lot with Modern Gear to make it sound old without beating it up. You can buy a Power Soak to load your speakers so you don't have to run the amp at full tilt. You don't have to slash and/or poke holes in your speakers either, you can make Buzz Speakers with a Plastic Garbage bage stretched over the front of the speaker to buzz when the speaker makes noises. There are many good (and affordable) pedals out there too.Invent your own sounds. Try to innovate off of what you hear from the Sonics sound, but not ape them.
I have seen there Backline and know their soundman. It is all Modern Gear. I could ask about what Larry uses on his guitar, but probably won't get more than a generic answer back. It is really the musician NOT the Gear.