I've fitted and am once again in the process of fitting Honda Integra DA9 seats to the brumby.
A bracket needs to be made up - use inch by inch angle. This goes on the outer side of each seat. Both rails use the factory front mount point, the rear needs a new hole drilled. A bolt and nut holds the rear of the rain in place.
The outer side uses this bracket to help strengthen the rear mount point of the rail. It also wraps up the side of the seat and is bolted in place where the seat backing mounts to the base of the seat. Some shaping of the bracket is needed her to make it fit nicely and have the factory Honda seat trim cover work it's magic (also needs lower edge to be trimmed to fit over the brumby scuff plate trim when fitted in the vehicle).
So far I've found that there are two interior colours for these integras - a grey-ish interior (that whens super faded looks blueish) and "graphite black" interior.
I'll get pics of the work once it's done

Cheers
Bennie