Please help finding a seat!!!!

Hey guys totally new to the group!
Can someone help find a seat I can use for my 81’?
I bought my bike for only $300, it was a steal!!
All I did was put in a new battery, gave it a tuneup and bam a great running xs400 special!

problem is my seat. I’m looking for a brat style seat. Can anyone send me links to buy one?!?!

I’m preparing to spend up to $150-200

Thanks everyone!!!

Plastic or metal seat pan? Are the seat pan and foam in good shape?