I'm coming down to the final pieces needed to complete my swap, and I have a few part numbers that were not available through Lithia Toyota.

They are as follows...

90301-56005
15472-88480
15526-88480 (I need two of these)
15149-88460
15318-88460

I've tried to google these to see if I could find them anywhere but had no luck. I need these to complete my swap. If there is anyone that can help please let me know. I've tried calling several different dealerships as well, and I don't speak Japanese so calling a dealership in Japan won't help!

What are those parts and for what car are they for?

The parts are for a 3rd gen 3sgte for an st205

the 90301-56005 is the large O-ring that goes between the oil cooler and the oil cooler body that bolts to the front of the block.
the 15472-88480 is the gasket that goes from the turbo oil outlet to the oil pan
the 15526-88480 (I need two of these) is the two copper crush gaskets that surround the banjo bolt that feed the oil to the turbo
15149-88460 is the oil pickup tube gasket that bolts between the oil pickup tube and the oil pump
15318-88460 is the gasket for the oil pressure regulator that bolts into the oil pan

wont a gasket place have this stuff?

A lot of the gaskets listed are metal crush gaskets. So likely not.