contact @dani_kk or visit Dmotorsports in G12 islamabad.
he will guide and help you source all the parts you require.
normally all parts of khyber you can source from ahata mitho khan and sultan da khoo in Rawalpindi.
the existing seats of khyber can be overhauled by doing hand-stitched leather or fabric posish.
console of corolla or cultus will not suit/fit in khyber. there are some option available online like daraz and partscentral