In my personal opinion - probably not. I bought the Heller Pourquois Pas? (French for "Why Not?" - maybe the only ship name ever to include a question mark) a long, long time ago - when Heller ship kits were being sold in the U.S. under the Minicraft label. It was one of the company's earlier efforts - and those who are familiar with the evolution of Heller kits know what that means: over-stated "wood grain," blobby details, nonsensical rigging instructions, etc. Heller reused the hull several times; I'm pretty sure the kit they called the paddle steamer Sirius was based on the same hull, as was the one they call a "brigantine." I think both the latter have been reissued recently under the Zvezda label.
There is a similarity between the Pourquois Pas? and the Bear all right, but it doesn't run very deep. Both had iron-reinforced bows for breaking ice, and both had screw propellers. That's about as far as the resemblance went, though. I had to study the Bear rather seriously a few years back when the Coast Guard Historian's Office hired me to make a drawing of her. The Smithsonian has a nice, detailed set of plans for her, drawn by the late Merritt Edson. She was, if I'm not mistaken, considerably longer for her beam than the Pourquois Pas? And the Bear's superstructure was mind-bogglingly complicated. She was, as you probably know, a converted seal chaser, and over the years so many deckhouses, guns, boat davits, and other apparatus got added to her that the drawings and photos are sometimes rather hard to figure out. She'd make a fascinating model, but I'm inclined to think that converting an existing plastic hull for the purpose would be virtually as difficult as working from scratch.
The history of the Coast Guard is full of ships that would make nice model subjects, if the manufacturers would just realize it. One that has enormous potential is the Northland. She was launched in 1927, a 216-foot, white-painted icebreaker with a modern-looking superstructure, diesel-electric engines, screw propeller, welded steel hull (with cork lining for insulation)a pair of six pounder guns on her foredeck - and a huge, brigantine sail rig. During the thirties the sails were removed and the masts cut down, and she was fitted with a big crane to handle a Grumman Duck aircraft. She served throughout World War II on the Greenland Patrol, having the distinction of making the first American capture of the war (a German-manned trawler named Boskoe) in September, 1941. After the war she was sold out of the service, but turned up a while later in the Mediterranean, carrying Jewish refugees to Palestine. She thereupon became the first, and for some time only, ship of the newly-created Israeli Navy. Now there's a subject for a model....Resin manufacturers, are you listening?
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.