If you have the money I say just go for it. If Tim made them for the Woodvil 18490 I would get one in a heartbeat. Just got a Woodvil on classifieds in very great condition and I would definitely feel better taking it with me wherever I go with a sleeve on it. Not to mention a leather sleeve on a wood mod would look awesome with a glass of scotch and a full beard.
Tim might make a sleeve if you send him the exact measurements. That's how I got mine for the VVG. (thanks again Lisa for helping me with the measurements!)