windharp - 9:17 am on Jul 20, 2007 (gmt 0)

Either try to follow the tree from the top to the most apropriate place or start in the shopping category you already found and check if it contains "Related categories" that point in the correct direction. If it doesn't, try to look into the parent categories.

If all that doesn't help, try to use different keywords in your search. Sometimes aking a friend who is not in the same busines/hobby/... as yourself helps as well.