Okay, found my calipers.
Spacer screws are 2-56, and .188" long overall, or about .145" thread length.
Latch screw is also 2-56, but .400" long overall, or .360" thread length.
Head diameter on all is about .160".
Standoffs should be threaded for 2-56 (obviously), and are .162" thick. They're also .25" in diameter, but that isn't quite so important.
As for a replacement latch, I popped an old typhoon latch in my K7, and it worked fine.
Sooo... Just looking around knifekits.....
Spacer screws:http://www.knifekits.com/vcom/product_i ... ts_id=2155(a bit long - will probably have to grind them down)
Latch screw:http://www.knifekits.com/vcom/product_i ... ts_id=2915(way long - will need to be cut down to fit)
Standoffs:http://www.knifekits.com/vcom/product_i ... cts_id=898(not as big around, but otherwise fine)
Latch:http://www.knifekits.com/vcom/product_i ... ts_id=2390(I think those are the same as what came with Typhoon Twisters, so should work okay. At $4, worth a shot)
Could hunt around at other suppliers for parts that might fit a little bit better, but those (and a little work) should be enough to get your knife in flipping condition again.