AMP recommendation please

Afternoon Chaps

Hoping you guys can help!
I'm looking for an AMP that would fit in one of the sections underneath the base board of my E81 120i and would be able to power a kenwood 12" that i have, and their respective prices.
THE SUB

I have an old American Pro AMP, but it won't fit flush underneath the board and i've been recommended a DLS AMP but wanted to know from the sound pros here if there is anything else that would work.

Any info would be great, THANKS!