That would be an even more expensive solution.
About US$250 or less: that is the price of the Olympus VF-2 accessory EVF, which offers 800x600 resolution ("1.44MP" with that dodgy triple counting of pixels) vs the current maximum of 640x480 ("920,000") for rear screens. AFAIK, Epson makes the panel and it is available to other camera makers.
Given your camera gear buying habits, such as option does not seem horribly expensive, if it were available and useful to you!