I have a 200 amp meter base and a 200 amp dedicated disconnect mounted on an exterior structure mandated by the servicing electric coop. My question is - Is there a weatherproof exterior panel that has a built-in plug similar to the one that is included in the outdoor temporary power outlet commonly used at construction sites? The reason that I do not want to put a full service panel at this location is the remote site's location and I only need to use 120 volts for a few hand tools periodically. Thanks,

This is a system, including a 50 amp outlet and cord to connect at the existing service disconnect. Will need a 50 amp disconnect protected by the 200 amp, and then the power outlet to this portable temp outlet system:

http://www.hubbellcatalog.com/wiring/catalogpages/Section-S.pdf

Take the 50 amp disconnect and outlet, and move onto other jobsites.

If truly a construction site, then you will need a 50 amp GFI 120/240 volt breaker, since OSHA requires this to be GFI protected for any worker's exposure to shock hazard.

Or see page 4, 8 of the following:
http://www.milbankmfg.com/Products/Catalogs/CatalogFiles/PDF/RV%2006%2004.pdf