Those Dahlquists should sound decent if refoamed. Rather than use one of my generic surrounds, I bought some from an eBay seller which claimed they would fit my DQM-9's 10" woofers, and they fit perfectly. And despite needing a bit of cabinet TLC (which I may get around to, if I decide to keep 'em), they sounded better than I remember them. Mine has the walnut veneer--I guess the Nextel finish was a "thing" for a while, and yeah, it can be a real bugger to strip down and redo.
BTW, I've read in a couple of places on the 'net that it's the DH-101 that is more preferred than the 110. I own both, and prefer the cleaner, more detailed sound of the 101 over the stuffy sounding 110 (which is also a lot more problematic--the pots and switches need a De-Oxit cleaning every few months, whereas I've never had to do the pots on the 101 in the almost 35 years I've owned it). It's all subjective though--the 110 has its fans. I'd probably like mine a bit more if it weren't so finicky. Seems like they cheaped out on the pots and switches.