I had each for some time, in fact two of each. One of the 3526s was pretty well complete an I passed on to a friend in Australia who is a keen Playmobil fire and rescue fan and a fireman. I now have a box with a fair number of chassis and body bits from both that will shortly need a good home and are clean and shiny.The 3781 ladder will fit the 3525 and may be still available from DS. The ladder from the 3879 and 3182 will do, too. You can see my refurbished 3781 here:http://www.playmofriends.com/forum/index.php?topic=2032.0
Thank you Bill! I 'll try it and let you know what happened. The fire engine is complete with all its figures and accessories..maybe missing one or two but not entirely sure...
You could set up a refurb shop for Playmobil, Bill. You could make a fortune.