Trickle charger electrical connectors?

Does anyone know where I might find some electrical connectors that are the same as the ones on my trickle charger? The charger came w a quick-disonnect pigtail that's permanently attached to my battery, and I'd like to be able to plug a portable air compressor into the pigtail in the same manner, so I'll need another connector that I can splice onto the compressor. EasternBeaver & Z1Enterprises don't seem to have them, and wending my way thru a million websites has become rather futile.

Mine is an old Schumacher Electrical Corp MC-1 charger. Here's a photo of a newer model. The electrical connector on it is similar but I don't believe it's exactly the same as the one on mine.
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That looks like a standard connector. I would imagine that Radio shack would have those, without having to go to a specialty electronics house.
www.radioshack.com/product/index.jsp?productId=2103449

Edit: Unfortunately, the 274-154 connector is too big. It may work on a newer charger & it may very well fit the one in the photo in my topic post. My charger is an older unit w a smaller connector.

Thanks.
Someone recently posted that wallyworld has a small/inexpensive air compressor, and sure enough they have one by Slime that fits in the palm of your hand. It has a 12-volt adapter that plugs into a car's 12V-supply adapter. I'm going to fabricate a pigtail adapter for mating the compressor to the battery charger adapter already on the bike. RadioShack & WMrt sell various 12-volt extensions.

For future reference: Model & catalogue # 274-154
RadioShack 2-position female interlocking connector
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Try the local hobby shop. That looks like a Tamiya connector for r/c cars.