Hear, hear!
On a serious note, what about trying to match lift springs designed for other rigs? I can't imagine its that difficult to find a spring that would work on a D2, you just need to match diameter, bar diameter, and get the correct length? But you never read about anyone doing this.
Actually, a lot of us have done lots of different things to build our truck (not rig) A lot of us got tired of posting what we did due to the ridicule.
go read some of the 'how to fit 35's' and similar threads, and see the reception.
Nothing on these trucks is rocket science. Figure what type of spring you want; linear or progressive. Figure out spring rates that are close to what you need then have adapters machined to attach them.
Then post, not brag or show off, to illuminate others another option. Just don't take the bait when people start to flame you!
Then people saying your an idiot because you either retain or don't retain
To piggy back what Peter posted, back in the day guys went outside the box out of necessity. Some guys wanted more than what was offered.
Flash forward, guys offering the bigger stuff found out it financially it did not pay off to market monster truck shit in a niche market. For every 5" spring set you can sell 10 2" expedition spring sets. For every DOM winch bumper you can sell 10 flimsy expedition winch bumpers.