Replacement seat and backrest for Equinox 10.4 Xtreme ?

Just started looking on Amazon for a replacement seat and backrest. The stock backrest has never been comfortable and came apart soon after we bought our kayaks.
I found one that required a lot of modifications, but am looking for a model that will be easier to install.
Would welcome suggestions from other Equinox 10.4 owners. Thanks!

Install 4 pad eyes and get yourself a clip in SOT kayak seat And a Wal-Mart seat cushion. Or a stadium seat that fits