Flasher help

Need some info on the flashers under my dash and a) i cannot find my darned Mopar manuals are and b) I have bugged one of our members too much and I don't want to wear out my welcome so...

I seem to have 3 flasher units:

What is this ?

The first one being yellow. Nothing is hooked up to it.
Markings are:

376 549
463
2884

It is 1.5 inch by 1 inch by just a tad under 1/2 inch thick.

2)

Second and third are round.

#552 and LF-224. The first is for the hazard lights, the second is for the blinkers. Are they interchangeable ?

I want to replace them with 2 of these..

http://www.superbrightleds.com/more...12anl-01-led-bulb-electronic-flasher/781/835/

Anyplace cheaper than 20/e bucks in Canada ... ?

Would Napa carry them ?

ian