the tightest window cleaner i ever met was a guy who i worked for many years ago.if you lost a window scraper(cheapo paint scraper £1 at the time)he would say use a 50 pence piece!he also use ladders until the rungs were falling off!!
by the way he used to brag he had over £40,000 in the bank.
just buy a new one mate esp as its a pump!!i use a shurflo 100psi and its still going strong after 2 and a half years.
best wishes
dazmond