a) I know nothing about CORDLESS venetian blinds and cannot recommend them

b) If I remember correctly I purchased a replacement venetian blind for the south facing window in the east first floor addition bedroom which I was unable to mount because they had changed the bracket style, and I was unable to mount the new brackets. I placed these new blinds at the foot of that window and left the new brackets on the adjacent desk.  Subsequently I though I recognized the new brackets in a second floor closet, but I never pursued the issue.

c) The existing blinds were bought at, and cut to the proper length by Home Depot.

d) After a set of blinds is cut to the proper length, it cannot be returned.

e) If you want my advice, just ask.