I'm in the area but based on the photo it looks like the back would need to come off. I might send the party a text and ask if the front grill is removable. If so they could send me a pic so I could get an idea of what's underneath the hood. There's also a set of ADS 810's on the Fayetteville CL but not a good enough price for me to go look at them.
That's an idea worth trying since they may be removable, but they appear to be either glued or screwed in place. I think that a reasonable drive and the removal of 18 screws may reveal some nice driver's and may be well worth your time. Keep us posted and good luck.