The message exchange pattern in EiQuote and EiTender has a Create with an emixBase, then a created also with an ID and an emixBase.
The emixBase in that return is not needed – the ID suffices.
Apply the pattern as follows:
Request can include 0..* IDs. If there is 1..* IDs then return that artifacts referenced by each ID. If none, respond with all quotes/tenders related to the requesting party.