I did buy some a few years ago - and I want more of them. They are better quality and dont break easily. But I cant find where i ourchased them. It was n ot my usual suppliers - it may have been a special offer..
I have pulleys which have plastic wheels set into aluminium frames. Most of these pulleys would be at least twenty years old and still work well. The brand on the pulleys is IEC. I have a number of metal triple pulleys which have been here longer than I have. They are over thirty years old. Some still function but quite a few are really stiff to turn in the frame. Old age is a bummer.
Lyn.
P.S. The most recent purchase of this type of equipment, which was some years back, came from Omega Scientific in Adelaide.