No special forum, but you don't need one. Everything you read here is applicable if you focus on style rather than price.
First focus on finding pictures of what you like in the WAYWN threads, then think about how you would incorporate that inspiration into specific wardrobe choices for yourself, and only then worry about how to make those purchases on a budget.
Be patient. If you are on a budget it is that much more important that you make your purchases count, so don't rush out to buy things on impulse. Focus on things that will add meaningfully to your wardrobe and not duplicate things you already have.
Finally, just because you don't have the same budget as a lawyer in his 40's doesn't mean you can't dress well. Don't get bummed that you can't afford a specific bag or specific pair of shoes you saw; just invest a little time in finding something similar (possibly used) for less. You have make some compromises, but that's okay - life is about compromise, always. Thrift stores, ebay and the SF buy & sell section will be your friends in this endeavor. Later on in life you'll have a bigger budget, and if you want to buy more expensive things you'll be able to. But if you've learned to dress well on the cheap you may find you never need to spend more, and you might be that much happier for it.
Inspirational answer...thanks man...I guess its hard to draw the line between buying something similar for less and buying purchases that count...doesn't always go hand in hand...but that answer made me smile thinking maybe I can still dress respectably. I do find that I'm dressing better than a lot of 19 year olds already so maybe I'm trying to move too fast to dress like you guys like you somewhat alluded to.