There were two different Maravia i.k. lines, both now long gone.
The first was made from about 1987 to '89, and those were called the "Challengers". They were based on one of Greg Ramp's (now of AIRE) popular kayak designs from when he built boats in Grant's Pass, OR.
Challengers were 35-1/2" wide, with 11" tubes, and a drop-stitch floor that was laced into the boat. All three chambers were fully coated with urethane, as was the thwart backrest. Only the bra's were uncoated. Almost all of them were navy blue. The solo Challenger was 9'1" or 9'2" long, and the very short tandem was just two feet longer - but it made a great solo self support boat.
Sadly any of these would be on their last legs due to their age. The solo was just 25 pounds and the eleven footer was about 31. They were basic patterns with a straight tube section, then a bent-up end cone. Not really fast but plenty of CA and Idaho boaters have run both models on class V.
The later Breezes I don't have the specs for, but I am pretty sure they were made before the early 2000's - probably more like the 1996 to 1998 range. Breezes had a smoother more sophisticated tube design and I seem to recall the 4" drop stitch floor insert just sat on top of a sub-floor rather than being laced in. And I think each size was a good foot longer than the Challengers. They only lasted one or two seasons. Then, as with the Challengers, Maravia decided they were too expensive to make anymore.
The same thing was more or less true with Jack at JPW. His two standard inflatable kayaks had similar specs and shapes to the Challengers, but they were longer. About 10'2" for the solo and 12'2" for the tandem. They were good boats and Jack wisely used 6" drop-stitch instead of 4", which made the tandem much more functional. They haven't been made for about 16 to 18 years now, so those too will be fairly ancient. Only the Sotar would be of more recent vintage.