You can make your own easily, anyway. Put excess solute in, and get the temperature reasonably steady. After you have weighed testtube, sovent and solute, evaporate away the solvent. You now have all the data you need. This makes a good, straight-forward investigation the pupils can undertake.
Slow pupils can do a few solubility determinations, and quick pupils can do more.
I recently had some fun devising a spreadsheet to generate a graph. The graph showed the path a ball would follow if thrown upwards with a certain amount of vertical and horizontal velocity. When I have time, I'll say more. With a feeling that perhaps I was being overly ambitious, I set about modelling a wastershed in a spreadsheet. It came out remarkably easily, convincingly, elegantly.