IMF Tech™ Training Gloves - Elastic Cuff at Ringside.com
These are some of the nicest gloves you can get, everyone I know who has used them loves them especially for sparring because they are so soft on your hands and your opponent, and they're good on the bag, pads and whatever else.
I would suggest getting the free catalog first, because in the catalogs their are sometimes better deals, I have seen the imf tech gloves in the link for as low as $65.
I don't know alot about headgear and groin guards but ringside.com and combatsports.com (ringsides mma brand of gear) should have whatever your looking for. I would get the catalogs first though.