I know it’s not ideal, but I used a steel oven rack/prep rack for quite some time without issues. I ran into the same issue as you and didn’t want to shell out for an adjustable bed that costs as much as my k40

https://www.amazon.com/dp/B00WS3OCWE/ref=cm_sw_r_cp_api_rrtIBb1EGRWNP

If you find something that works for you, let us know!

I really like Checkered Chef’s cooling racks. They’re dishwasher safe. https://www.amazon.com/dp/B00WS3OCWE/?tag=atkequipshort-20