Honestly the only way you might to do that is have
@Buck design you a box. Find a friend who can make it for you for a case or two of beer. Going 10 years in the car audio game is almost unheard of anymore because of the products that come out on yearly basis.
My suggestion is this...find a good used amplifier, new set of subwoofers and the buck box design while bribing a friend to help. Idk where you live but has to be someone near you who can help? All you really need is a saw, some clamps, glue, #6 screws and a tape measure to build a okish box and even then it will be leaps and bounds above a prefab as it will be designed for the subwoofers you pic. Buck can design a very simple box for just about anything and the very small fee is worth it.
A pair of these below combined with the amplifier below. However NO Warranty on the subwoofers. For that price it is worth taking the chance just set the gains right and it isn't hard.
Description Specifications Box Specs Audio Legion’s Armada 12 is a 12-inch car subwoofer designed for extended, low-frequency play in a daily driver. Available in dual 2-ohm and dual 4-ohm configurations, this durable woofer provides incredible bass at an economical price point...
audiolegion.com
<div id="Standards" class="spec-group"> <h3>GM-D9701 is a Monoblock (1-channel) GM digital series amplifier. It has an RMS power rating of up to 500W and a maximum power output of 1200W. This amplifier features MOSFET modulated power supply, wired remote
www.woofersetc.com
Those pioneers are nice little amplifiers and put out what they claim that would be 1,200 at 1ohm which would be perfect for that setup in a 12" or this one below
<h1><span style="font-size: medium;"><img src="{{media url="wysiwyg/SUNDOWN_AUDIO_-_AUTHORIZED_with_Warranty_new_.png"}}" alt="" /></span></h1> <h1><span style="font-size: medium;">Sundown Audio SFB-1500D Monoblock 1500W RMS Car Amplifier</span></h1
www.woofersetc.com
I can't remember the exact price range you had. I "might" be able to even find you a mono-block amplifier as well as I "might" part with a PPI Phantom 1000.1 and if you look up the youtube video on them they do more then rated and is a damn good amplifier.