Cecil Moore wrote:

Most hams use one screwdriver antenna with various
lengths of counterpoises.

Don Johnson in one of his 1990 books featured a photo of a dipole with two
screwdrivers in the 90's. Since hams can build a screwdriver for about $50
each maximum if good scroungers, it's doubtful an SGC tuner is a cheaper or
easier solution than said screwdriver dipole.

Such an antenna won't be a great antenna, but then again an indoor stealth
antenna is never going to be competitive with full size outdoor antennas
well removed from buildings and the like.

I'ld personally rather be on the air rather than arguing the merits of a
screwdriver antenna versus an autotuner with wires and counterpoise.

Can it be done? Sure.
Has it been done? I'm sure it probably has, I've just don't remember
hearing about it.
Would it work? Certainly much better than no antenna at all!
Would it be difficult to build? Just depends on the builder's
imagination and how 'handy' he/she is.
Would there be a commercial market? Probably a small one, with all
the characteristics of a small market.
Are there other ways of going about it? Sure, refer back to that
imagination and 'handy' thingy.
- 'Doc