This is a genealogy board, so not directly for the search of living persons. You can try the phonebook in english on http://en.detelefoongids.nl/ In the who field enter Schellen In the where field enter Nederland. You get 146 hits. You can narrow the search bij entering tne town in stead of Nederland. Eindhoven has 14 hits, Nijmegen (watch your spelling) 1, Oss 3, "s-Hertogenbosch 1, Tilburg 4.
As full adresses are shown you can try to send letters or try phoning. You need to replace the starting 0 by the international entry code followed by 31