Although currently not in stock, there is a company that sells Progressive Industries components for a very reasonable price. As an example, they currently have the "external PI 30 amp EMS" on sale for $99. As I said, they are out of stock, but are honoring the sale price when they get more stock. The PI EMS-PT30C typically sells for $250 -$300, so buying it for $99 is a "steal"....
http://www.ecspremier.com/30-Amp-Por...lectrical.html
They also have the 30 amp hardwired EMS on sale for $99. It is NOT the model with the remote monitor. This model has the monitor panel built into the actual device.
http://www.ecspremier.com/30-Amp-Har...HW30_p_47.html
Seems to me (YMMV) buying a CAMCO look-alike for more than the original can be found doesn't make a lot of "budget sense".....
DISCLAIMER: I have no interest in this company, but I have purchased items from them online. I have no complaints with their service or products.