https://www.amazon.com/dp/B01E4TS360?ref=ppx_yo2ov_dt_b_fed_asin_title^^ Works OK on my DPA 4060's. Got the idea from someone else here.
I also have DPA's binaural set (4650). That one is more noticeable. But for me, no one has dared asked if they have ever noticed (looks like a hearing disability helper if you can see it, and if you have a hoodie and longer hair then it's almost impossible to see anyways).
I have schoeps and MixPre's and everything, but DPA's binaural set (4650) -> Zoom F3 is the thing I grab first when I am not 100% sure what I'm walking into, and I run it as backup even when I'm running schoeps-> mixpre-6 as a main array. DPA binaural always sounds good, natural, and usable to me. I like it way better than BLM's, for example.