I read a thread a while ago that I think said that you would need different mounting brackets but you can get them in. I think it was on honda-tech that I read it not sure
I've definately seen pictures of them in an accord so they will phyically fit but i remember them needing custom brackets. You probably can modify the stock accord bracket by looking at the rsx bracket. Sometimes you get lucky and you can just basically use the top of the bracket for the new seat. Welding is most likely going to be needed.