Alright, I'm glad to hear your repair is holding up well still. I liberally applied red locktite to the driver's side inner tie rod threads. These lasted 110k miles, if the car makes it to 220k the rack will just be replaced. I haven't put the outers on yet, but I will definitely put some anti seize on.
The biggest problem with mine isn't that the hole is stripped out. It's more that the old tie rod left a decent amount of its threads literally stuck (melted?) to the very first few threads of the rack. I can't even get the new tie rod to catch on the rack to start turning. I'm going to try and pick up a tap like OP and see if it helps.
The other thing I was thinking was to just drill out those first few threads. If you look at the tie rod, the thread ends before it reaches the "bolt" part, so threads wouldn't even be holding there even if the threads were perfect.
She doesn't even have a horn anymore, but don't want to destroy the airbag. I'll just tie it somehow. Hopefully it doesn't come to that though.