I'm struggling to make sense of that? Haha
If I find a facelift front in 040 for sale then I'll either;
A. Buy it and then advertise my bumper with RMM lip for sale.
B. See if the owner would consider sending the bumper and cash my way in exchange for my bumper with RMM lip.
If I find the facelift 040 bumper I'm after, as per scenario A., I would be selling my bumper with RMM lip for cash only as I wouldn't need your one due to already getting one!
In addition to that, however, if I can't find a facelift 040 bumper then I would consider a facelift bumper in a different colour in exchange for my current bumper with lip.
I'm confident that I'll find an 040 bumper though, well... hopefully!