F355 Momo steering wheel boss wanted

A coworker of mine is looking for a "boss" for a Momo steering wheel that is on his F355. He is located in Japan and says he can't find this part anywhere. I assume he means the trim ring/tube that surrounds the steering column. I thought it was the same as stock even with a different Momo steering wheel installed. Can anyone shed some light on this for me....I feel quite stupid about it.

im looking for the wheel by momo called symbol center cap or the whole rim either or i lost my center cap

[Vorsteiner M3]

Contact Euro AutoWorks they might be able to help. info@euroautoworks.ca