Nice article in the Double Gun Journal a few issues back on the Marlin 90 by James Tyson. Had lots of info & pics on some of the higher grades.
They had truck load of parts for the 90 when I worked there in the early 70's but refused to do any repairs on them,,, as they did with most all their older model guns.
Barrel sets from 12 down to 410 and even some shotgun/rifle sets. Stocks and every small part made for them. All bagged, bundled and tagged from the move from the old plant in New Haven.