Started reading up on Cryptographic Accumulators recently to incorporate them in a project. Using this survey to understand what features the accumulator needs to offer it seems I am looking for a Dynamic Universal Strong Accumulator that only supports addition. This paper lists reference  as having the above characteristics in Table 1, but reading the paper it turns out those accumulators also support deletion. So far I have not come across something that meets the necessary criteria.
To summarise, is there a kind of cryptographic accumulator that is:
Universal, ergo can support both membership and non-membership witness
Strong, does not require a trusted third party
Dynamic, member set can change but only supports addition and NOT deletion of members
Thanks a lot for any help.