When we bought our 1980 Whitby 42, Hull #80 INDEFATIGABLE in 2010, she needed all new running rigging.  We purchased all of it in a single order from onlineropestore.com - they were theonly vendor we found that had a wide enough range of sizes and colors to meet our needs.  The "goal" was to rig the boat in such a way that we could take friends/ kids sailing and have them pitch in without having to know what the proper line names were - so we could tell them to pull in on the blue line, instead of using the term "jib sheet", and there would be only one blue line in the vicinity, so they couldn't mistakenly do something bad.  Anyway, the spreadsheet below was the tool of choice for the planning phase, and it turns out that there is a demand for a "list" of what lines, and what lengths of line, comprise the running rigging of a Whitby 42.  Everything below is double braid polyester, except for the preventers, which are nylon.  Also, spinnaker sheets were made up in nylon, but they are not on the spreadsheet- they were purchased later.  Figure on the length of the jib sheets plus about 25%.  If you've read this far, you must have a need for it, so without further ado, here it is:

 

Line Dia Length Color Show  
Aft Main Sheet 3/8 80 White with Blue fleck      
Baby Stay, Mizzen Port 5/16 21 white with red fleck      
Baby Stay, Mizzen Starboard 5/16 21 white with green fleck      
Davits Inner 3/16 90 (2 pcs) White with Black Fleck      
Davits Outer 5/16 115 (2 pcs) white with black fleck      
Jib Furler 5/16 85 White with Blue fleck      
Jib Sheets 5/8 100 solid blue      
Main Cunningham 5/16 10 white with black fleck      
Main Halyard 1/2 110 Solid white      
Main Jib Halyard 1/2 110 Solid White      
Main Outhaul 3/16 5 White with Black Fleck      
Main Spare Halyard 1/2 110 White with Green fleck      
Main Spinnaker Halyard 1/2 110 White with Red Fleck      
Main Spinnaker Pole Halyard 5/16 80 white with black fleck      
Main Topping Lift 5/16 110 white with black fleck      
Main vang 5/16 10 white with black fleck      
Mizzen Halyard 5/16 75 White with Blue fleck      
Mizzen Outhaul 3/16 5 White with Black Fleck      
Mizzen Sheet 5/16 55 white with black fleck      
Mizzen Staysail Halyard 5/16 75        
Mizzen Topping Lift 5/16 75 white with black fleck      
Mizzen Vang 3/16 5 White with Black Fleck      
Preventer, Main (nylon) 3/8 120 Solid Red      
Preventer, Mizzen (nylon) 3/8 80 Solid Red      
Reef points 3/16 45 (9 pcs) White with Black Fleck      
             
Totals            
miz   vang, 2x outhauls, davits inner, reefing 3/16 150 White with Black Fleck      
jib sheets 5/8 100 solid blue      
main and jib 1/2 220 (300) solid white      
soinnaker halyard 1/2 110 white with red fleck      
spare halyard 1/2 110 white with green fleck      
miz,   main toplifts, spin pole, miz sheet, davits outer 5/16 455 (600) white with black fleck      
             
main, miz preventers (nylon) 3/8 200 solid red