Kawi Specialists i need some help...

Im a mobile mechanic- mainly deal with I/O and Inboard engines but took on a jet ski engine job for a regular customer.
2016 STX 15F broke a connection rod cylinder 4, wiped out the crankcase, cylinder walls. I'm about to pull the trigger on new OE cases from the local kawasaki dealer. Ive found a couple used cases on ebay but seems as tho the part numbers dont jive. Looking at the pictures the look like theyll work but all of the cases ive found only work for up to 2008 engines. Curious to know if anyone on her knows if i could use those older crankcases/cylinders or if anyone has ever done this? Is there a way to cross reference these numbers? Ive talked to SBT engines and wont have a reman until august. Checked all the salvage yards they reccomended without finding any parts engines. Any input or info is greatly appreciated my customer is eager to get this thing back on the lake.
Engine ID from the blown up block JTT50AE055666
Thanks everyone

Brian