I don't know the differences amongst various Dynamo cut corner cabs (haven't encountered one since the old Z-cab we had for our SF2 CE back in '95), but it looks like it has roughly the same depth as the Pit Fighter cab my 25" K7000 is in for Street Fighter Alpha 3.
I've seen them both ways, and I think physically the newer and older style Dynamos were the same size, just I THINK the main difference is that the newer ones had the ability to rotate up to a 25" monitor from horizontal to vertical orientation and vice versa without any mods.
seeing as how my family owns Crete Family Fun Center and we operate a lot of games, I get a majority of my parts through Happ and sometimes Betson Midwest too. recently though I popped for a ton of cap kits and rebuild kits for like 6 monitors through
www.therealbobroberts.net. if you've never ordered there, giving you a time table, I mailed my check from Steger to his place on a Monday and got my parts by Saturday. you only have to do that once, then he'll allow cross-shipping with payment needing to be received within 10 days of shipping. he only takes checks or money orders, but he's got a lot of hard to find parts, and his prices cannot be beaten.
I live in Tinley Park, I've dealt with people from New Lenox, Bourbonnais, Chebanse, Rockford and Hammond, IN.. that I can remember off-hand. knew of another guy in Oak Forest and another in Mokena, never met them though.
and whereabouts are you from?