I don't mind being paired up; I have met some real nice people this way. Since I end up wanting to golf and most of my friends don't play, I would just call the course and say "hi, I am just a single golfer, can I play today?", and they would just say to come out here and we'll get you out. So not usually a problem.
In my way of thinking, if I don't book a foursome, I am at the mercy of the course anyway as to where and when they want to put me and that's perfectly ok, I accept that. The main thing is, I get to play!!!
You should get it pretty quickly. I ordered mine on 2/15 and it was delivered 2/20. They're based out of AZ, and I'm in SoCal, so the shipping was pretty quick to get to me. You may experience an extra couple of days depending on where you live.
Also, if you're looking for a different shaft for it, you could always look at getting something from The Golf Works. They have pretty much any shaft you'd want as well as the PXG adapter. I believe they can install the adapter for you as well for a small fee.
I used to play as a single a lot (I likely will be doing this again as I get back into the game), and I don't mind getting paired up with another group. I always try to be mindful of who I'm paired with, and let them set the tone. If I'm paired with a threesome and they want to do their own thing, that's fine by me. If they want to chat a bit, that's fine as well.