Jameson,
There are a lot of easy/inexpensive sub designs you can build yourself. You could build a couple of bucket subs and dress them up to go with the Jaegers. They are pretty inexpensive and remarkably good. There are many options from PE also. Remember you don’t have to use an integrated plate amp. You could get a decent SS amp off eBay or build a decent DIY class D amp and have stereo subs for a pretty reasonable sum. Any of these will work with your X2.
Jamie