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Question: Fail Smog Certification and Power Steering Belt

Hello, I am trying to register a 1987 Nissan 300zx in California. Took it to a smog check it failed. Walked over to mechanic was told that it needed a new catalytic converter, paid to have one installed. While driving around before going to have it rechecked for smog compliance the power steering belt broke. Failed smog again, returned to mechanic for additional adjustment and power steering belt. For some reason am told that the ordered belt didn't fit and still do not have one. Have had a 2nd new catalytic converter installed and now a new muffler but still fail CA smog certification. Most recent emission test results are:
15 mph RPM 1542
HC (PPM) = 186 *allowable max = 112 FAIL
CO% = .21 * allowable max = .51 PASS
NO (PPM) = 1365 * allowable max = 545 FAIL
25 mph RPM 2503
HC (PPM) = 61 * allowable max = 61 PASS
CO% = .03 * allowable max = .42 PASS
NO (PPM) = 332 * allowable max = 502 PASS

Is there something you could suggest to help me pass smog? Between the repairs that aren't working and multiple smog checks this is quickly becoming very expensive.

Also, is there any reason you can think of that the power steering belts aren't fitting? is there something quirky about them?

I am going to a legitimate mechanic and as it stands right now, without power steering I am not strong enough to comfortably drive it to a different mechanic. Please help.