I bent my passenger rear lower control arm over the weekend. It maybe have even happened before but I just noticed it today. Are there any issues driving on this until I can get a replacement/upgrade?
Your rear axle may be "cocked" ever so slightly so that it's not tracking straight. There are numerous rear trailing arms available, depends on how much you want to spend.
The axle will be crooked as was pointed out earlier, might cause some tire wear. It's hard to tell how much without throwing it on an alignment rack, but I'd try to get a replacement sooner than later.
For what it's worth, I reinforced my lower links after I replaced them with some new-ish FJ Cruiser ones that had 20k or so on them (customer gave them to me, didn't need them when I put in aftermarket ones for them.)
It took some patient stitch welding and some cheap angle iron from home depot.