83B is the step above 101A (which itself isn't supposed to be a thing, technically), isn't it? I live for super hard wheels. Those are hard.
I'm going to have to switch to new ones soon and I'm nervous about popping the Swiss 6's out of them to reuse them. I used to give a void of shit about my bearings because for the longest time I'd skate nothing but cheap ass Reds I'd retire and replace every new set of wheels but those I fell in love with and I want to reuse. Plus they're expensive and shouldn't go to waste. I've never even taken care of them or cleaned them (I'm not nerdy enough for that shit, I roll through grime every day) and they're still in perfect condition after like a year. I was 15 the last time I reused bearings I think.
About the States I got a bunch of them a while back, at the beginning of the year before their distribution in Europe went to shit. But they've been fixing that and the shoes should be way easier to find (hopefully) as soon as January.