Classic Lego Space Sets

I'm new to this subreddit and have gotten a few sets on Aliexpress over the years. Thanks to this sub learned about other resources and marketplaces for clone sets and mocs.

With all the clones and mocs floating around - is there anywhere I can find clones or mocs for classic sets like Deep Freeze Defender? And other set lime space police, explorians, spyrius, etc.? It seems to me there would be demand for this but I cant find anything