I noticed BB Sharp 1.7 rockers used in Hot rod's "Mild Mauler" build. There is no sign of them in Harland Sharp's store. Nothing in Summit either.

Why aren't they strongly demanded for Big Blocks? I know some possible excuses...

My heads dont flow better above 0.50":
That might be true for a 906. A typical aftermarket head sees cfm increases up to 0.75" and dyno improvements up to 0.80" lift

I would just get a bigger cam (lobe):
You'll be forced to take unwanted duration. Your hp peak will end up beyond 6500. Low end torque would suffer greatly.

I would just switch to a solid roller:
It helps, but why settle when brand x has the best of both -- low duration achieved through solid roller AND 1.7

I'll have lube issues:
Project 505 and Mild Mauler resolved lube issues

Shafts can't go that high and I don't want to pay someone to machine my heads to a pedestal:
Mild Mauler did it without machine work. Mopar shafts should be an advantage, not disadvantage. If demand was strong enough, I'm sure the aftermarket would iron out glitches.