Given the chassis and frame repairs I've seen, I absolutely promise your strut mount is fixable. There's just no clean warm-fuzzy-with-guarantees fix, it's all hot rodding and fab skills at that point.
Also, given the reliability of the 4.0L 5AT 4th gen 4Runners, I think it's 50/50 on whether or not there's anything non-Toyota at any price, new or otherwise, that can match the reliability you're used to.
I'd buy up into a newer 4th gen or an older 5th gen 4Runner and live happily ever after.