I am pretty sure - if you ask the creator friendly if they will make a recolor .... - I really guess the most will make it - and not for money ...
Well I stared to mesh this year - I am not perfect at all by now, ok - don't use free 3D's and make all by my self - but I made some recolors because people asked me for them. I also made recolors from other meshes for people they asked me for doing this - and I NEVER was thinking of money when I did this.
When I create something - doesn't matter if I build a house, make recolors or a new mesh - and I offer it for free - I do not want anyone to make money with something I just made because it is my hobby to do this and I just share it with other people for free.
that happens all the time at MTS2.....often creators will do reclours for people...because it is their hobby and they do it for the love of the game. Sometimes a creator will say no to a request, if they have too many tho...and I can understand that.