What Color Shrinkies

I think you could do either one, clear or black.  My hair is a little darker than #4 but amm's is far lighter and we've both used both with success.

Also Kristin can get you LG next day (or at least she can for me and I'm on the east coast) though Canada could be rough.

How long do you plan on wearing this install?  Latex gets gummier and gummier over time.  Keratin is difficult to work with.  Have you done fusion before?  cause then you'd have keratin experience. 

This is human hair that you are h oping you will be able to reuse right? 
whatever you do coat it in nail glue and let it set up over night before you install.  that seems to keep the tips together.