Barrett Enterprises in Azusa, CA (818-967-5171) lists decent prices for 
Bentley manuals.  $26.95 for the 66-69 and 70-79 Beetle manuals.  $69.95 
for the new reprint of the 61-65 Beetle and 63-67 Transporter manuals 
(which Bentley listed for almost $100 initially).  Don't know if they 
stock Loaf or Vanagon manuals tho'.  I have no connection to this company 
(just saw the ad).  I'd check the used book stores first.

        Bob Hufford                 \\  //   
     "...in the GROOVE"         \\   \\//   //    The Good/The Bad/The Ugly
 General Registry Of Ozarks'     \\   \/   //      '60 Double-Door Panel
   Volkswagen Enthusiasts         \\ //\\ //       '81 Vanagon (Sunroof)
   bhufford@mail.orion.org         \\/  \\/        '61,'63,'67,'72 Bus Bones