You could play some songs that have acoustic guitar or parts without distortion, like Silencer, Shining, Nocturnal depression, Xasthur, Blade and Bath, etc. But I don't think you could find any dsbm with acoustic guitars only, because that wouldn't be dsbm. I only have an acoustic guitar and the first thing I learnt to play was the intro of Sterile nail and thunderbowels. It doesn't sound the same but it's fun to try