That's a real shame that there aren't any rra lowers available nearby
Do you feel comfortable assembling your own lower? Here's a link to a video explaining it.
It's pretty straight forward. It requires a small investment in tools, if you don't have them already, of about $50. I recommend using a nylon and brass hammer for the roll pins so you don't have to worry messing up your finish.
If you feel comfortable, here's a list of some good parts:
A DPMS Lower Parts kit minus fire control group.
RRA 2 stage trigger
An Aero Precision stripped Lower
Haven't heard anything but good Things about them. ($90)
An A2 buffer kit. (not the A1)
An A2 Stock
A Bullet Button
And a wrench to tighten the buffer tube
Total: $386 with tools, $336 if you already have them.