Which wire from Radio Shack?

Need recommendation on wire to buy from Radio Shack for building a flashlight, need it now, no time for shipping. thanks

I'd look for 20-22ga and high strand count. Silicone wire is probably too much to hope for.

Get silcone wire from Buddy RC

Edit: sorry, didn't see that you needed ASAP.

Can’t you just recycle some old mains cable?

Radio shack LOL.
The last time I was there I asked the kid working there if they had any 18650 size batteries. All I got was a blank look and he said what’s that?

You can get silicone wire at your local RC shop in several sizes.