Has someone reinvented the wheel? I have been using wagtails for over 20 years and used converted stanley paint pad handles for WFP swivels for the last 15 years. Gardiner swivels took over the WFP side of it.
Alas, they stopped making the stanley paint pads in the old form, and can't buy the original Wagtail combo either. The latter is a great bit of kit, one pass washes and squeegies using very little water making it great for insides.
B&Q seem to have stopped selling the Harris 5m extention pole, I still use one to do 1st floor french doors that have bars in front of them. That Harris pole took many of us into the world of WFP costing just £15 at the time.