I think that you are far too optimistic in this regard. Some time ago, to demonstrate how easy it is to find Luke’s alleged fascination with creating a hidden “Ark” message by importing wording from the OT, I produced this proof that Stephen is, in fact, the new Ark:
a) Stephen is brought before the assembly of the religious leaders of God’s people (Acts 6:12) and the religious leaders of God people are assembled before the Ark of the Covenant (the AC) (2 Chron 5:2)
b) The Lord appeared upon the mercy seat of the AC (Lev 16:2) and the Lord appeared to Stephen just before he died (Acts 7:56)
c) Stephen was full of God’s power (Acts 6: 8) and the AC was called the Ark of God’s power (2 Chron 6:41)
d) Stephen did miraculous things among the people (Acts 6:8) and the AC did miraculous things among the people (drying up the Jordan at Jos 4:15-16, striking Uzzah dead at 2 Sam 6:7)
e) Stephen had the face of an angel (Acts 6:15) and the AC had angels on its lid (2 Chron 5:7)
f) Stephen saw the glory of God above him and the AC had God’s glory fill the temple area above it (2 Chron 5: 14)
g) The last record of Stephen’s existence on earth is at Jerusalem and the last record of the AC’s existence on earth is at Jerusalem.
h) Stephen’s last recorded resting place was amongst stones and the last recorded resting place of the AC was amongst the stones that formed the temple.
i) The ark of the Old Covenant disappeared, and no trace of it can be found anywhere on earth. Stephen has disappeared and no trace of him can be found anywhere on earth
j) The Jews shouted in front of Stephen (Acts 7:57) and the people shouted before the AC (2 Sam 6:15)
k) Stephen asks God to forgive the people for their sin (Acts 7:60) in stoning him and Solomon in dedicating the temple with the AC inside of it asks God to forgive the people for their sin (2 Chron 6:27).
Personally, I don’t think my proof is any weaker (or more contrived) than the one that has been produced regarding the Mary-Ark connection