Looks like that us just a generic seal ;
Also fitted to Mitsubishi. I found generics for $3.This one is branded for $9
MITSUBISHI ENGINE OIL SEAL 28*40*8 R mm NJ 373
Here are some SKF with higher temperature material:
https://www.motionindustries.com/productCatalogSearch.jsp?q=28+X+40+X+10++++MM+A-NBR+SEAL
My personal rules with seals and bearings is to buy the best/most expensive:
https://www.motionindustries.com/productDetail.jsp?sku=00611488
Because the R&R costs 100X that of the generic seal price.
ASk California MotorSports,GTGears, or "Erick"to comment.They are much smarter than me on this issue.