You don't
If you want models from the 90s most of the
GW ones from back then won't even be sold by
GW they will be second hand models on ebay. So you're not putting any money into
GW's hands
Otherwise if you want current models buy current models - get them from a 3rd party shop that way you're helping your local market.
Otherwise there's loads of 3D designers doing their own unique takes on models in spired by
GW designs. Go support them
Help the market grow and evolve don't support recasting/rip off designs.