TOPIC: Mystery Trihull Fiberglass Boat

Hey yall - recently bought on old fiberglass trihull for some small lakes/river fishing. Needed to replace our large canoe to allow for solo adventures. Anyways, the boat manufacturer is a mystery and am looking to some experts for help identifying. I recently pulled off some metal plate repairs on the transom and found a PARTIAL manufacturer name, so i hope this isn't hard. I've dug and dug on the internet with no luck even finding another boat picture like this, let alone a manufacturer name. I also tried to decipher the missing letters in the name, but fell short. Really I think the only identifiable letters are the lowercase L and maybe the last letter is an S?

Thanks for any help.

What i have:
Manufacturer: _______ Plastics Corp.
Year: Assumed 60s, trying to pin down a better year.
Model: Ranger 11
HIN: 4 digit (pre 1972)
Length :10'-10"
Construction: Fiberglass trihull, aluminum gunwale
Location: Wisconsin, so assumed a builder in WI or midwest. Boat seems to have been here all its life.

Side note: i am totally refurbishing the boat, its got fully rotted wood in the keel and transom, so excited to learn what it is.

In the mean time, restoration is under way. All rotted stringers, ply floor support and transom removed. New transom being built (laminating 3/4 ply and 1/4 ply for the 1" original thickness)

I found the reason for the water intrusion - i floated the boat and water leaked right around the drain plug tube into the hull at a pretty fast rate.