I have a set of vertical blinds approx 120" x 90". I inherited the from my parents house and they are about 25 years old. Recently the cotton cord broke and I am unable to find anyone who records blinds. I am told by local repair (Wash, DC area) places that no one 'records' vertical anymore. The whole track is replaced!
These blinds were custom made way back, when vertical blinds were just on the market as window coverings. They are in excellent condition and I can't see just scrapping them.