Quick question, can't fit a shift lever style remote as I've got a twin lock lever where that would go. Is the RaceFace style 2x lever worth the extra over the Brand-X one?
Are there any others?
This is a Specialized Command post lever - it should work with most cable operated posts (I think) - I've used it with a Tompson dropper.
I have two that I dont use anymore - one fits in place of a Specialized grip lock ring (as in the photo) and the other is a normal bar clamp.
Dont know if that would solve your problem but if your interested i'm sure we could sort something out.....

Is your twinlock remote over or under the bar?
Mine are under: I use a Giant branded one: it can be used right way up or upside down.
https://www.cyclestore.co.uk/giant_switch_seatpost_x2_lever_and_cable_set-ID_74271?sv_source=google&sv_medium=cpc&sv_campaign= [campaign_name]&sv_term=[keyword]&gclid=Cj0KCQjw6sHzBRCbARIsAF8FMpWO-b_6OEPYxWfi6Li0PULAnv2hzkTC6fRcubEz4zqCHlalyfKk8G4aAjfrEALw_wcB
I am sure there are others that are similar.