Hi Gordon
Just bought some from T Norris for a similair stuffing box, mine was 1 1/2" id x 3" long £9.00 plus postage.
However wall thickness is 3/8".
You will not buy the hose shaped like you show, it has formed like that when clamped, Mine is 1 1/2" id to go over the 1 1/2" o/d lip, bit pipe is 1 1/4" od that it clamps on!
Also recommend you use the heavy duty jubilee clamps as like me you probably can only get one on each end.
Mike