
As Hubcap said, the forks are different internally. Only the right one has the dampning action, both have springs.
As Sandy said, you should buy your springs and swap them yourself or with the help of someone local. You'll need a special tool to remove the left fork pipe bolt #11. Many people have them and will lend them out. If you lived nearby, I'd help you out, but Chicago is a ride.
You should swap out your seals and dust caps also (#21) and have a couple of slider busings (#10) handy in case they need replacing.
A couple qts of fork oil and you've got everything.
I've done it 4 or 5 times and it's time consuming, but it's satisfying to do it yourself. If your ripping the front end apart yourself, your almost 1/2 way there.
Good luck