Recently purchased a pair of second hand bottom outer window scrapers.
Problem was they were about an inch too short. Now after searching the forum a found that this was a common problem but no solution.
Now this may be a common fix but I will go ahead and explain how I got them to fit anyway....
I bunged them in the sink and poured over 2 or 3 kettles worth of boiling water. Left them for around 5-10 minutes. Removed them and popped them in a vice (using suitable vice protectors). At 5 equally spaced points along the scrapers gripped the scraper in the vice and pulled. I repeated the process along the 5 points. Checking it against the car there was a noticeable difference in length. Scrapers now fit perfectly.
Worked for me.
Let me know if it works for you.
Cheers,
Gav