Hi Tony,
I look forward to seeing your car
1/ Aaron @ wearegm@aol.com (a service parts distributor in California) is good at finding stuff for us. Email him, tell him you are a member of Corvettes NSW
and he will look after you. He will initially need the VIN of the car to identify it fully.
2/ Dunno - never had them.
3/ Try Aaron if needed.
4/ The original tyre kit has a compact little pump and bunch of chemical goo that will have long expired. The pump is useful but I have just bought pressure cans of tyre sealant from any car parts store and carry that. As you might remember from my car, there are cheap rectangular buckets available (Bunnings...) that fit perfectly in the rear trunk cavities for this stuff.