Spare Tire

I was cleaning up the garage last weekend and came across the damaged rim from my incident with a pothole in May.

So I thought about getting it repaired and using it as a full sized spare instead of the mini-spare that comes with the car. Anyways, I called around and found out that since there was no crack, it would cost about $75 to have it put back into "round". I checked on Craigslist and there are used single 215/45/17 tires for between $50 and $75.

Now should I look for bi-directional tires since uni-directional tires would be right or wrong depending on if I replace the flat on the driver's side or passenger's side? Or since it would be only temporary, it wouldn't matter?