Travis I bought two stinger fans both are Stinger SGJ78 8 1/4" fan. They sit flat next to your amp and blows the air directly at the amp and cools it down pretty good.
Okay this is what I did. I raised my amps off the carpet which is one of the reasons why it heats up. I bought a 4 pack of door stopper rubber ends. You know those type of door stoppers that you buy that attaches to the door at the bottom and you flip it down and it stops the door from closing. See attached links below. Any ways I used just the rubber end refills made for that type of door stopper as a spacers and this keeps the amp off the carpet and the fan then blows under the amps as well as hit the amp straight on.
Then I bought the stinger SGJ11 Thermastat so when the amps get hot or the area where the amps are kept get to hot it turns the fans on or off. It attaches straight to your boat/stereo battery and then to each fan. It attaches on the amp on one of the mounting screws on your amp, super simple. It works great. I have 4 Kicker amps and it keeps them from over heating. I wanted to also attach an exhaust fan StingerJ34 to blow the hot air out, but I haven't gotten around to it. Here are the links from where I bought all of my stuff. Hope this helps.
Temperture Control switch
Another type of fan or the exhaust fan. I am going to mount mine so it blows the air out of the storage compartment.
This is that type of door stop I was talking about. I just buy the rubber refill it comes two to a pack for like a dollar at ace. It is an 1" high and because it is soft rubber it squishes down and acts like a lock washer and keeps pressure on your amp mounting screws(stainless is the way to go). This acts like that spacer so the air gets under the amp.
I wish I had pictures to show you, but it does work for me. You can set the temperture you want tfor the fans to turn on with that Thermastat switch. All this stuff is pretty cheap too. Good Luck.