Assortmet of DC barrel connectors for bench power supply?

[dos]

I'm wondering where I can get an assortment of the most common barrel connectors used on AC adapters in a configuration that's easy to hook up to my bench power supply (connectors with leads already attached?). I work with a lot of small gadgets that are all powered with wall warts and it would be nice to have a selection of these connectors, but all the assortments I find on Amazon seem to be adapters for use with laptops which convert one type to another type, not something designed to wire yourself to a power source. If anyone knows where I can get a kit like this I would really appreciate it!

[CustomEngineerer]

I had an extra of something similar to this: http://www.walmart.com/ip/30W-Universal-Wall-Charger-Plug-in-Adapter-with-6-tips/50785468



i just cut the wire off of the wall plug and put banana jacks on it. The one I used, the power supply didn't work anymore anyways. It already comes with multiple tips that can be switched out. If I end up needing a  tip that I don't already have I usually just buy an individual solderable barrel connector and wire it up by it self.

[sleemanj]

CustomEngineer's solution is probably the best.

But you can get tips which take 5.5/2.1 barrel and convert to some other size, (5.5/2.1 is the most common barrel size, hence why it is the "input" of the tip changers), so you can  just make up a lead with 5.5/2.1 plug and bananas on the other end.

A few examples (no affiliation, just a search)
http://www.aliexpress.com/item/Universal-DC-AC-Plug-Charger-Tip-Power-Adapter-Converters-input-5-5mm-2-1mm/32591015389.html
http://www.aliexpress.com/item/5-5-2-1-Portable-10-dc-convertion-connectors-DC-tips-for-universal-adapter-power-charger/32254322600.html
http://www.aliexpress.com/item/1Set-A-Lot-28Pcs-OF-5-5-2-1-Universal-DC-Jack-Power-Supply-Adapter-Connector/32607005823.html
http://www.aliexpress.com/item/Round-1-row-12-seat-laptop-power-supplies-universal-adapter-power-adapter-DC-head/32615423364.html