From the horses mouth
The Catalina parts department told me they haven't published a new parts and price list for the Cat 27. They apparently have changed their part numbering scheme for models now in production. Internally, they reference parts from the old numbers to the new ones and then to prices (watching them do this is funnier than a Chinese fire drill, and when done, they don't look any happier than you or I for not having a current parts catalog). The good news is that in many cases, the Cat 27 parts are outside of the new system and they haven't raised prices in YEARS (since the old list was published). As a result, though the current situation is cumbersome, parts prices direct from Catalina are nearly ALWAYS MUCH CHEAPER than aftermarket.