I used to clean the windows of a lass who'd had the pancreas/kidney transplant, I'm sure she knew the 'source' (no offence meant in using that term) of her new organs, we'd have a crack about it all, me "I was hypo this morning" her "it's been x years x months since I've had one ner ner ner

). It took her a few years to ride her horse again but pre transplant she had the dialysis at home, which I found a little mad!
To make the op look more common I then had my gas serviced by a guy who when he saw me fingerprick mentioned he'd had the transplant.