One of these frames/customers that actually went, or at least try to go swimming.
5035 - Shenzhen (800)
5036 - Delta (900)
5037 - Air China (800)
5038 - Southwest (800)
I haven't dug deeper into it for a while. 6 Frames alledgedly were crushed/dismantled.
Haven't looked into the other serial numbers.
Link
It just took 10 seconds with Mr Google...