Source for standards

An easy one I hope, and following on a bit from my previous topic.

I'm about to be in a position where I need access to various standards for panel manufactur and design.

I have a reaosnable list on the go of what ones I need, but searching the internet to access them has understandably provided me with several diffferent sources. Some look more legitimate than others and som legitimate looking ones (like the BSI knowledgebase seem to only have an out of date version of one standard that I'm looking for...)

Can anyone recomend their prefered sources for these.

Obviously as a start-up, budgets are big consideration, although I suspect there isn't much difference in price between the different sources?

Many thansk

TB