seat foam

[macs07]

Drivers side seat foam in my sons 98 F150 (Captin chairs) has gone soft on the get in and out side.
Can you buy just one seat foam, if so where?

Has anyone replaced the drivers side seat foam, is it difficult??

Can you switch the drivers side seat portion with the passenger side seat portion instead of replacing the foam??

[bj_m]

how to replace http://www.ramforumz.com/showthread.php?p=62694

for a dodge - but basically the same idea

or here http://www.f150online.com/forums/articles-how-tos/370044-official-leather-install-guide-w-pics.html