The hub carriers are magnesium, so likely to be made specially for the Ace. Couldn't decide what type of bearing are use in lower fulcrums. I had expected to see tapered roller, but they appear to be needle rollers or bushes. However, wear wasn't my reason for removing the hubs, so didn't investigate further.
Several points that might be of assistance - a) nearside hub retaining nut has left hand thread b) puller is needed to separate hub from stub axle c) the hubs are a tight fit on the lower wishbones - I made a spreader to spring the lugs apart sufficiently to slide the hubs back on.