Intel's new and improved 4040 microprocessor was designed into this kit - the Micro 4/40 from Compu-Sultants with 256 bytes of RAM, from late 1975. Price was $275 as a kit, plus $100 for an assembled unit. 200 made but only 10 sold. Photos mostly from the slideshow on the Old Computer Museum site which has more details:http://oldcomputermuseum.com/micro-440.html
Via the article The first decade of personal computing
by David H. Ahl in the 1984 retrospective issue of Creative Computing
where he asks
"What is: an Altair, a Sphere, a Jolt, an RGS, a Scelbi, an SWTPC, a Micro 440, a Mike 2?"
"They are all microcomputers available at the end of 1975."http://www.atarimagazines.com/creative/v10n11/30_The_first_decade_of_perso.php
Stephen Gray wrote Building your own computer
where he says "Today two dozen different microcomputer kits are available, based on half-a-dozen different microprocessors, and about 7,000 have been sold, a great many to people with apparently little or no knowledge of electronics." He mentions the 6502-based Jolt for $249, and others based on F8, 6800, 4040, 8080 and PACE. "So far, BASIC is available on only a few hobby computers, including the Altair 8080, Sphere, and Jupiter II."
That was published in 1976, when his Amateur Computer Society was already ten years old, but microprocessors had changed the game:https://www.computer.org/csdl/proceedings/afips/1976/5084/00/50840235.pdf
I found a couple more mentions of Compu-Sultants - this reminiscence by Jack Crenshawhttp://www.embedded.com/electronics-blogs/programmer-s-toolbox/4372172/How-I-got-embedded--a-special-connection
describes how they erased EPROMs by leaving them out in the sun.
and this short quote from a designer:https://classictech.wordpress.com/computer-companies/compu-sultants-inc-huntsville-ala/
Don't confuse this 4040-based Micro 4/40 with the 68020-based 440 from Stride:http://www.sageandstride.org/html/photos_2.html https://en.wikipedia.org/wiki/Intel_4040