A Long Eye Relief or Intermediate Eye Relief 20 to 25 power that is made by a major scope manufacturer that would have excellent optics and would be good for load development, varminting, short range benchrest and long range benchrest.
Would you be willing to pay the same amount for this kind of scope that you would for a rifle scope of the same caliber?
Would you buy one?

Greetings! If it were tough enough to withstand harsh recoil, had adequate windage and elevation adjustment so as not to run out prematurely like some target scopes, had excellent coated optics like the Bushnell Elite 4200's, had a truly GOOD paralax adjustment whether an objective ring or a side-focus, and had a 30mm maintube for decent sight picture as well as outer tube surface area for ring-gripping, then sure. I'd pay the same for it as for a decent rifle target scope.

Certainly, but then there are only a certain number of us that are into speciality handguns that go for the ultra-long-range handgunning. One only has to attend one of the Bower clinics to realize that it is a minority of us "Nuts", that really go all out. Bottom line is, I don't think it's a large enought market to interest a scope manufacturer.

A tiny field of view is one of the biggest problems as well as the small potential market size. It is more likely that the market would support someone doing custom conversions on standard rifle/pistol scopes than a start up on a production item. Did Wally Siebert ever deliver on the 36X Leupold EER Conversions? How did that work out?

Yes,
There is a strong chance there will never be enough of a market to have a company make one--but we can try hard (sqeaky wheel get's the oil...).

Wally has delivered on the conversion (36 Leupold BR to 20 LER). He has also set up the first ever ballistic dot reticle with one of these conversions. More on that in the future. Right now Wally is the only game in town with LER high magnification scopes available in 20 or 16 power.