I have been dealing with Mann Lake LTD for years. They are very good at Customer service, their equipment is of good quality, and they often ship for free.
They are expanding very rapidly here in the US and just opened a new facility in PA. The woodenware that they sell here comes from a manufacturer out west; Colorado I believe.
I would be surprised if they carry anything except US format hives. My assumption is that they would continue to use their supplier here and ship the equipment there. With the difference in the costs of hives here, vs there that would be very profitable for them.
Hives I have bought from them have been Doug. Fir and frames are Southern Yellow Pine. Both are very good woods with a long service life.