Right now the only professional active model maker I know of is Draxaca, go ahead and visit her thread / page to see details and her work. In general you should just visit the "models" section found here
https://www.rune-server.ee/runescape...client/models/
There are also other model makers in the community such as shawnguy, pown, devchaseblade, and more but they are usually harder to get in touch with these days (personal experience). I myself make models and have released some of my work but I don't really consider myself a professional yet.