Arm crutches or hospital type stick (Cheslyn Hay WS6)

Does anyone have any of these arm crutches they no longer need... I have been using a stick for a while and just been told I have tennis elbow and my shoulder hurts when using my stick and can’t get the hang of using it left handed so the dr suggested using 2 so thought maybe the ones with the bit that goes round your arm or another hospital stick as they are more sturdy... thanks in advance