Hi, thanks.
I'm answering part of my Q by looking thro UK online parts catalogues. On front suspension so far, a couple of CR-V mk1 items are same as Rover, most but not all same as Civic mk5 and 6, CRX mk3. Don't know where I can find out where Stepwagon Mk1 is same/differs from CR-V mk1, its closest cousin AFAIK.
Useful to know what is not same, as well as what is. Or maybe won't help, but I know that searching Ebay for Fiat parts, then Lada, FSO, Lancia, Alfa etc can turn up more choice in equivalents.
I'd still like to know what is usual practice with Honda - get new wishbones, links etc, or fit new bushes to existing, and does that require presses or separators?