Hello pilgy,
welcome at Stridaforum 
Well…you’re late to the party…seems that this Korean merchant is “the last man standing”…
https://www.koreamtb.co.kr/shop/item.php?it_id=1503020790
Just be careful, these above do NOT fit MK1, but definitely Strida 3.
(Any images to help verifying?)
Good luck,
Chris