I am in a bit of a weird spot: I am applying for tenured positions which require external referees from outside my institution and my "immediate" circle of co-authors.
Problem is, I have very few properly "senior" colleagues outside these circles (none?) who can produce a reference that would be based on a true knowledge of "me and my profile" - those I knew well are... dead, and the others are too peripherical, junior, or just not trustworthy.
How do I go about finding the older, respected scientist who will provide occasional advise, but more essentially, the sponsorship that I am very much lacking just now? I feel awkward about googling people and sending them an email out of the blue. I would also suspect that they are swamped with prospective mentees and existing mentoring responsibilities (I am, so can sympathise :/)