ISO Bliss stick thigh blocks

For sale for $40
$$$! Got a friend who I’m outfitting a boat for. Bliss stick playboat. No knee/thigh braces in it. Anyone have some laying around in the garage or have a broken kayak with them? If I were a betting man, I’d guess their size is universal to creekers or playboats so we can take them from any bliss stick boat.
He’s happy to pay shipping and for parts themselves. Thanks