I've been asked if I am still producing the plugs, yes I am and printing off another batch in the next couple of days.
I have found that the acrylic boro's are a bit tighter, I'm reluctant to reduce the size as a press fit helps reduce the airflow so standard ones would be too loose, I would advise anyone with the acrylic version to shave off the plugs with a craft knife which is what I did with mine, or any other suggestions?