X-JaVeN-X

Alright guys, I can't find one of these in any store locally to me, so need to see if you guys might know somewhere online to find what I need. I'm installing an amp in my FC, and I going to run 4ga power and ground cable for it, but the terminals on the amp I"m using (alpine mrp-m650 monoblock 600w rms), only accepts up to 8ga wire. It just has the basic binding post where you slip a spade terminal underneath and tighten down the screw. Anyway, I can't find a terminal that will accept 4ga wire but is narrow enough to slide in this 8ga sized slot on the amp. Does anybody make such a thing? If I can't find anything I'm just going to pic up a small 4ga - 8ga (x2) distro block and run a short as possible length of 8ga to the amp.