Need help on a few things...ignition, wipers, window leak

Hi there...finally fixing up some minor problems that have come up with my 97 4 door blazer. After researching the board i have come up with the following solution but I also need confirmation on the following:

1) Ignition switch - driving down the road and car will momentarily cut off then back on, sometimes has a little trouble starting up. Does this sound right? Can anyone give me a part number or link to the correct part?

2) I have already ordered the wiper board that has given everyone so many problems and plan to put that in as soon as I get it. Can't wait to have wipers that actually work in the rain!

3) Door gasket for the drivers side window. Again, anyone have a link to the correct part number?

I am having my fiance's son put all this stuff on for me, he's pretty good if I can just get him the right parts.

Thanks in advance!

GTP