Yes, while it's perfectly understandable how you spot this as a way of getting this great gear at a low price, you're really crossing the line we're already balancing here.
You may think that as long as you financially compensate whoever helps you out then you're not stepping on anyone's toes. Not so! It's a thin and invisible line, I agree, but there's a difference between for instance asking if anyone has a GSSL built that they never use, and then you're willing to buy, and systematically organizing that someone build gear you want for you for money.
Learn to do-it-yourself, buy the originals or exchange favors/gear. Do it in some way that does not mean that you're cheating SSL, Universal Audio et.c. of their profits.
There are people like Jakob E. and others who make these projects available and doable for regular people like you and me. They dug into what the original designers created and explained it to the rest of us. If you pay someone to build it for you, then doesn't Jakob deserve to be compensated? The original designer?
If you build it yourself based on info you discuss in and take in through this online community of diy'ers you stay on the right side of the line. That's perfectly legal. Paying someone else for building it for you is not only it's immoral but downright illegal in many (if not all) countries.
Read this only as an explanation and encouragement to dig into it yourself. You will discover a new world full of extremely helpful people and odds are that if you're active in the community you will receive more than you ever hoped for to begin with.
It's not that difficult! Most of all it's a question of just doing it!