Help finding part number/part online?

I feel like I must be doing something wrong to have this much difficulty finding something this simple, so I'm hoping someone can throw me a bone here...

Trying to get together parts/materials to change oils in differentials and transfer case. I've never done this before, and I'd like to do it right.

Got the oils, got the right tools, trying to get the right gaskets/crush washers and am now stumped. Don't want to order from Amzn because I don't trust anything from there and I need to feel confident that if it's not leaking in the first little while after the service it won't start. Trying to order online because the nearest dealership that sells parts is like a 3 hour round trip and a toll that costs more than the parts.

Part numbers I have are

$14 12157-10010 Toyota Oil Drain Plug Crushable Steel Gaskets Set of 10 OEM 12157-10010

12157-10010 x3 and 90430-24017 x 1 (replacing

$3 90430-24003 Front Differential Drain Plug Gasket

90430-24003) for the differentials. Those seem fine.

For the transfer case I have part # 90430-18008. I've tried 5 different websites now from dealerships that sell parts online (found by searching around TW). Four of them call this part "gasket" but describe it as "transfer case shift shaft seal" which doesn't seem right? And none of which have photos of the part, only part diagrams, which also don't specify which part in the diagram is listed. The fifth says this part has been superceded by part #9043-A0003, but when I look that part number up says it does not fit my vehicle, and the included part diagram definitely doesn't match what I see when I look at the fill and drain plugs on my transfer case. There is an actual picture on that one though and it... Seems about right?

(Truck is a 2012, 2.7L L4, 4AT, 4x4, TRN245L-CRPDKA...)

Anyway at this rate I'd have spent less time making the drive and less frustration paying the toll than trying to figure this out, so if anyone here could point me in the right direction and save me from doing both, I'd be grateful!

 

https://parts.olathetoyota.com/oem-parts/toyota-drain-plug-gasket-1215710010

https://parts.olathetoyota.com/oem-parts/toyota-gasket-9043024017

 

Appreciate it!

You know which one for transfer case?

https://parts.olathetoyota.com/oem-parts/toyota-transfer-case-shift-shaft-seal-9043018008

Or

https://parts.olathetoyota.com/oem-parts/toyota-drain-plug-gasket-90430a0003

90430-18008 is part number from tutorial threads here but "transfer case shift shaft seal" doesn't sound right? Both say "this doesn't fit your vehicle"

 

I buy this from Amazon for my truck. They show you which ones are for which drain/fill plugs

$7 12157-10010 90430-24003 90430-18008 Differential and Transmission/Transfer Case Drain Plug Crush Washers Gaskets Compatible with Toyota 4runner Tacoma Tundra FJ cruiser Land Cruiser

https://www.amazon.com/dp/B08K8S3B2D


This is helpful too:
https://www.tacomaworld.com/threads/front-diff-and-transfer-case-oil-change-howto.147631/