I took Critter Rescue Ramp by DuaneIndeed and straightened out the straps a bit to fit my pool and then separated the second ramp from the lily pad and resized it to 200 x 145 x 27mm to fit my print bed.
If I come back to this I'll straighten out the straps a bit more. Theres a bit of an upward slope in the back that doesn't need to be there.
This was printed in Danti Tech PETG. I've made other outdoor items with this material and it really holds out to the hot Florida sun here.