There actually is a thread for requests, that tends to sit pretty abandoned most of the time. Most requests go unfulfilled.
hypnohub.net/forum/show/5634The reality is that many artists don't take kindly to requests. While I don't have anything against them personally if the request is worded in a polite and undemanding way, I don't tend to follow through with them very often.
Many artists are tired by the number of unsolicited suggestions and requests they receive which just sound demanding and entitled. Artists give a lot of time to their drawings and that means most of the time, they're not willing to spend that time on something that doesn't interest them personally, or doesn't bring in money.