I run into that very thing more than I'd like to remember! I try to order parts in bunches, what I need and what I might need in the future, as I am in the same boat as you when it comes to locally available parts. We have a nice Hobby Town, but they don't stock many Mini-Z parts. You would think as hot as it is for most of the year here in Texas the mini-z would have a bigger following. I think a big part of it is the thought that the Mini-Z is a over priced plastic toy by the larger scale rc crowd. I got a few weird looks when talking to the Hobby Town owner, by a few customers who were spending big bucks repairing their 1/8th scale bashers, when asking about racing mini-zs. They don't understand that this scale racing is HARD, compared to any of the 1/10 and 1/8 scale racing I have done. All other racing seems slow, even at the speeds we ran on Dirt Oval with RC10GTs.
Anyway, excuse my rambling, I'm stuck in my recliner on the heating pad as my back is out, bad! Can't drive now as I can't bend down to get the cars on or off the track. Have fun with your new Z, and get ready for more! Just over 2 tears ago I started with a mini-96 track and a ReadySet MR03, I now have 6 Chassis and more bodies than my Wife would like!

I also took over my Son's old room, and it is now my R/C Man Cave!
Take Care Guys and be Safe on your Holiday Travels! Drew