I'm sorry that you're having problems with the transport. What would be a better thing to do, would be to see if you can appeal the decision, or find out how you can get the transport back, by presenting evidence by your psychiatrist that you still cannot use public transport.
It is not the Naloxone in Suboxone that stops you 'feeling' the opiates anyway, it's the antagonist pat of the buprenorphine itself. The Naloxone has a very low oral bioavalability, and is in reality little better than a marketing gimmick. So as long as you have the buprenorphine in you, and are taking it every day, it should block the effects of opiates.
I know that in the short term using might seem like an attractive solution, but in the long term it's going to be a very bad move for you. If you did develop a problem again, you can't get back onto MMT because of Maincare, so you'd be doubly screwed.
How is the Sub holding you day to day? If your dose is under 16mg, it might be worth seeing about an increase. Too much over 16mg and the agonist effects get outweighed by the antagonist parts, but it does differ for everyone, and if you're feeling bad it can't hurt to try an increase.
I know you tyalked about gettin goff the Klonopin, so is your anxiety a little better? Would it be at all feasible to even consider public transport? Maybe trying it at a time when it's going to be at it's least busy?