Came across these today for our electric actuator users. (Appear to be new. Perhaps not, maybe I'm behind the game.) They have all the specs and stroke lengths up to 6" stroke on their site. Selling out of Idaho. These would not be strong enough for heavy builds like the bigger steel dozers like my one and I won't be testing or using them since I now roll my own in a flash but they would probably be OK in Bruder-type rebuilds with the push of 4.4lbs.
https://microlinearactuator.com/prod...near-actuator/
They have a pdf with all the specs and drawings for fitting.