I don't know anything about that box, but I do know a bit about the HF key situation.
I bought an end box from HF for cheap (someone had locked the keys inside). So, I drilled the lock out once I got it home and called HF customer service, to get a new lock sent to me. They didn't charge me a dime.
The HF lock is like nothing I've ever seen (and my dad was a locksmith). It is sort of a 'christmas-tree-shaped key. Other than that, the body of the lock looked like any other cheap desk or office cubicle lock. (which might work for getting them all keyed alike, if you have a cheap source for those locks).
That's a long story to get to the point that there were several options to order, so I had to talk to a specialist. There were 'multi-lock' options available (i.e. they would send you just one lock or a set of 6 locks). I assume the set of six locks would be keyed alike.
So, if you get more than one HF cabinet and you want them keyed alike, I would recommend calling their customer service dept. They will likely charge you a little, but you could have them all keyed alike.
M_P