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I've seen both the 75/35 and the 34/78 in a few stores recently. A few of our vendors sell them so you should call or email to ask about availability. The older 34/78 is a bit more powerful. I'd go for the 800 CA version.
I take it you decided not to try an odyssey battery. Thought that would be easiest to have shipped for you in addition to a great battery.
Just to avoid confusion for anyone interested, the proper one to get is the pc1200LMJT, i.e., the one with + on the left. The 1200MJT has the + on the right. None are made with side posts that I am aware of.