That CCA HM20
might be an option. It's apparently a 1 + 7 configuration with 1 DD, 3x dual MF BA and 1 x HF BA. Compared to 1 DD, 2x dual MF BA and 3 HF BA in the CCA CA16. None of the BA's are in the nozzle so same as the CA16 there, the sound tubes might help more IF they are well implemented All the drivers are updated to the Black "s" versions including replacement of 30095 with 30019s. Given the change in driver count and type it's unlikely to be boosted above CA16 in treble, although if 50024s has wider frequency response, that might be due to a higher point for the crossover between MF and HF BAs. XUN-7 is potentially an improvement too. Lyra only stated improved upgrade XUN, but no designation. This may be same driver. Price with $12 coupon is the same as CA16 until end of October.
This might be the new CA16. Which makes sense to receive an update, since it was one of their better models.
Unfortunately it does not appear to share the same semi-custom shape, which could be a deal breaker.
Feedback before the coupon times out will (as usual) be tight, but these may be the droids er... IEMs you're looking for!