$36k sounds like a good starting point for what you're looking for...however, I do NOT see too many low-options Rubicons...95% of the ones Ive seen have leather, navigation, premium sound, dual top, etc etc...so they're all $40,000+
Finding a bare bones basic Rubicon is a bit tricky. The one I found is relatively low option - it has cloth seats but has premium sound, power windows/locks (obviously, I think ever Rubi does), blue tooth connect...but otherwise nothing fancy. It's one of the few low-option Rubis I could find.
Your $36k target is reasonable, you may just have to look a lot to find a Rubicon priced at that
EDIT - Ah just realized you mentioned ordering it...yeah, thatd be your best bet anyway. To keep it at your price range you'll have to order one with little to no options. Mine is Commando Green as well :-)
2013 Commando JKUR - bone stock