No, there were no pre-gens created for use in The Harrowing.
I believe that as of mid-March, The Harrowing
is only open for PFS play using standard PFS character who are at least level 8 (too low for it, imo).
You could advance a level 7 pre-gen to level 9 for use in The Harrowing
if so inclined.
Azmyth is currently running The Harrowing as part of BAPS PFS play in the Bay Area. However, as Azmyth is at Dundracon
this weekend, but he'll post on this topic later in the week, I'm sure.
Speaking of which, let's look in on Azmyth and see how hard our Podcast Narrator and Venture-Captain is working this weekend, shall we?
Yes. There's Az on the left drinking with Our Glorious Leader, Mike Brock, Paizo's PFS Co-ordinator, in the middle. In this picture, Azmyth is describing to Brock how to tamper with a d20 to ensure that mobs in his home game can roll a 20 for DCs and roll critical hits at an alarming rate. In this picture, Brock approves of this die tampering insight and vows to bring back the secret to unleash upon fellow Paizo employees at just the right moment.