The trouble with having two is difficult to part with one; I know that feeling. it's a bit like taking nice trainers of one of your children to give them to the other. I realise the 115 has been earmarked for disposal but if a buyer knows their cars, the removal of the flaps is obvious.You intend to sell off the 115, don’t you? Why not just snaffle the flaps from that for your 135?
I have the flaps on my 02 TF but the lift up one was in my opinion designed by an idiot, when open it obstructs your view and if you inadvertently shut the boot with it open CRUNCH. I have seen a thread (and checked) that there are mountings to swap it around to open the other way, one day I will get around to doing it and then waste 20m the following week trying to lift the wrong side!