So before I pulled my three pot spoiler I had always assumed there was a rubber gasket of some sort sandwiched between the trunk lid and the spoiler and when I got it off I noticed it was a sticky adhesive type of gasket connecting and sealing the base of the spoiler. I was wondering is there a specific part number for this part?
Is there a Part number for? - 6G Celicas Forums

The original part number isn't applicable anymore
76872 PROTECTOR, REAR SPOILER, NO.1
JDM ST205
from the oem parts catalog thread:
Protector, Spoiler Ctr
76872-20150
$4.57 (according to 1sttoyotaparts.com)
Protector, Spoiler Ctr
76872-20150
$4.57 (according to 1sttoyotaparts.com)
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Awesome what would I do without you guys lol