Maybe you need to get with Fellay and give him the good news.
One condition of SSPX reconciliation, stated repeatedly, is that the excommunications be "lifted".
Clearly, invalid excommunications don't need to be "lifted".
You might like to bring this to the attention of the SSPX Superior and inform him that he's belaboring a nonexistent problem.
In much the same way that marriage sacraments are annulled. Marriages formally recognized by the Church, officially recorded and declared, are later judged and declared to have never been valid from day one and not worth the piece of paper the marriage certificate was printed on. Now until the decree on nullity is declared the marriage is recognized as valid by the Church, even though in reality, in regard to the spiritual effects, and in the eyes of God, it never had any validity.
In this way, Bishop Fellay is asking the pope to recognize and declare the reality that the "excommunications" were never valid.
Fellay doesn't need me to reiterate what he already knows.
"STATEMENT OF BISHOP FELLAY
to SSPX Members & Friends
January 22, 2001
In August, at the end of last summer's pilgrimage to Rome, Cardinal Castrillon Hoyos had a first direct contact with the Society's Bishops.
During the month of November the same Cardinal, under a mandate from Pope John Paul II, invited the Superior General to come to see him "to prepare a visit with the Pope".
On December 29, Cardinal Castrillon proposed to Bishop Fellay different elements that could serve towards a possible agreement between Rome and the Society. The Superior General expressed his point of view, his distrust, his apprehension. (Although never before had Rome gone so far in favor of Tradition).
On December 30, for a few seconds, the Superior General saw the Pope in his private chapel. (No words of importance were exchanged).
On January 13 there was a special meeting of the General Council, of the Society's Bishops and of the delegate of Bishop Rangel, at which were established the principles to guide us in the present situation.
On January 16, there was another meeting with Cardinal Castrillon, during which the Superior General exposed the necessity of having guaranties from Rome before going ahead in the details of eventual discussions or an agreement:
That the Tridentine Mass be granted to all priests of the entire world
That the censures against the Bishops be declared null."