What are realistic drop in coil spring replacement options for an 04 DC 4x4?

Yep.

 

Too bad it's so expensive in Canada. Makes sense why so many Canadian vehicles I see are US domestic.

I replaced my front coils recently with Toyota. No way around it, if you want quality, you're going to pay. There are some places you can get away with cheaper parts, but for a lot of stuff, if you spend $100 instead of $300, you're just going to be spending more later to replace them soon, and in the meantime will be unhappy with the performance of the cheap parts. Not sure if there's a compromise shock/coil combo. Might actually be the Bilstein...

 

Someone here, like within the last 6 months, suggested Dorman makes repop springs, and I've also heard Moog does as well.

Honestly, if I were @TinaTundra04, I'd buy a pair of Old Man Emu 2883 springs and install those. They'll be close enough to OEM, provide a smidge of lift for a truck that's already raked lower in the front to an absurd degree straight from the factory, and nicely settle up the front to overcome any sag the old worn springs were seeing.

I'd buy the 2883s, and get Bilstein 4600s, and the ride height would be exceptional. It'd sit about ¾" higher in the front, have zero negative impact on the suspension. If you just went with the springs and the front struts, he could be out the door around $500 USD in parts, I believe?