This is my suggestion, and assumes that you or a friend are capable of safe, reasonably simple electrical work:
1) if you want to use the PDU, you will have to swap the outlet for an L6-30. Pretty much any and every PDU uses it. (208V and 240V are effectively the same function and polarity, most stuff is rated 200-250V). This is pretty simple and will cost about $220 total ($150 for PDU and $30 for the outlet, plus tax/shipping/etc).
2) use the 6-20 connectors. These are pretty easy to wire up, and are the same layout as the exsing dryer plug (each blade is a live wire, ground is the pin). you could get a gangbox that fits two outlets and wire it quite easily. you might need an extra foot of 30A wiring to set the receptacles up in parallel, and make sure you clearly mark them as being limited to a total of 30A. (In fact, I would limit them to 13A each to give some headroom). Cost is around $40 ($10 per receptacle, $10 gangbox/cover, taxes, etc)