Years ago, the lad behind the parts counter would have been an enthusiast, these days, they are brain dead, staring at their tiny screen all day.
Quite a few years ago, the plastic water tank for the toilet cracked, dripping when full. In the UK, we call this a cistern. 100 yds away, is a builders merchant, with new toilets stacked along shelves. Behind the counter was a young lad, looking disappointed that I had disturbed him, and might drag him away from Farcebook.
"Do you have a plastic toilet cistern?"
Pause, while firing up the second brain cell.
"Is that a plumbing item?"
"Not to worry, goodbye."
A phone call to a better plumbing supplies shop, 12 miles away yielded a complete kit, including all the internals, for £20, without any hesitation, "yes we've got loads of them."