Brian,
As David Marks says, you can always get a plan reduced or enlarged to the scale you want to build at, although there might potentially be a slight advantage in starting from as large a scale plan as possible, as a plan intended for a larger scale model is likelier to have plenty of details, whereas a smaller scale plan might have some of the finer detail omitted.
This said, I am aware of the following, commercially available plans for Puffers:
1. My Hobbystore has five different Puffer plans, Lochinvar, Raylight, Skylight, Inchcolm and "Clyde Puffer" (see **LINK**).
2. Brown, Ferguson and Sons (**LINK**) in Glasgow still publish all the Harold A. Underhill plans, amongst which is a 1:48 plan for the Puffer Sealight. These plans are available, either direct from BF&S or from various sellers, e.g. The Model Dockyard (see **LINK**, 3rd plan from the top).
3. The Model Dockyard also has other Puffer plans, including Pibroch at 1:50 (**LINK**, 8th plan from the top), and Clochlight at 1:36 (see **LINK** ; you'll also find the Raylight, Skylight and Inchcolm mentioned above on this page),
4. Kingston Mouldings sell a 1:24 GRP hull of the Puffer Inchcolm (see **LINK**) which, if I understand their website correctly, comes with a scale plan. However, I have no idea if this plan is available separately, but one could always ask if one were interested.
Good luck with your plan hunting,
/Mattias
Edited By Banjoman on 24/09/2015 07:24:44
Edited By Banjoman on 24/09/2015 07:25:39