I used to have a set. For what's it's worth they were crap in my opinion. All the suckers kept falling off, they never fit the window properly. Really bad quality (and I think I bought good ones). Very dissapointed ;-( Great for a quick fix though.
Want top quality? Buy my lightly used Fanchers screens - worked perfectly for us.
US supplier, http://fanchers.com/71/68-79 VW Bus.htm
Their site is a little confusing but we have a full set of SUNBLOCK screens
Every window is covered - 6 pieces which works out around $200
Our set is on ebay 181365655900 for more pics £70 shipped. pm for details
As installed on our bus (no longer with us);