WTB: E36 sedan safety equipment

[Senor_Taylor]

Hey everyone. Getting a little ahead of the curve here on this search, but I've sourced 1 seat (Thanks Tian!) and brackets. I'm looking for a good deal/suggestion for the following:

E36 92-95 Sedan Bolt in Roll Bar (for now). I don't have money for a weld in cage just yet and a I think a half cage is overkill for DE, but I'd like to do this at least intelligently. I would do a harness bar, but having seats and harnesses with no rollover protection doesn't make sense. There seem to be a few options out there. Does anyone have a suggestion or recommendation? 

I need 1 fixed back seat, any safe condition and brackets to get it in the car. 

2 sets of harnesses. I think this one doesn't matter to just spend money on newish ones, but who knows. 

A wheel? Should I leave the air bag in if I have harnesses? Should I have harnesses without a Hans?